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Colloquialism (noun) Colloquial (adjective): A word or phrase that is not formal or literary, typically one used in ordinary or familiar conversation. The use of ordinary or familiar words or phrases.
Slang (noun, adjective): A type of language that consists of words and phrases that are regarded as very informal, are more common in speech than writing, or are typically restricted to a particular context or group of people.

Ajuitar (noun): An ajuitar is a musical instrument played by Hotblack Desiato in the band Disaster Area.
Android (noun): A humaniform (having body with a head, two manipulatory arms and two legs) robot with artificial intelligence.
Babel Fish (noun): The Babel fish is a small, bright yellow fish, which can be placed in someone's ear in order for them to be able to hear any language translated into their first language. Now it is such a bizarrely improbable coincidence that something so mind-bogglingly useful could have evolved purely by chance that some thinkers have chosen to see it as a final and clinching proof of the non-existence of God.
Barzoo (proper name): Barzoo is a Damogranian Pom Pom Squid working as a masseur on Han Wavell
Belgium (noun) [exclamation]: The worst, most rude expletive in the entire known Galaxy.
Many people have been killed or have accidentally caused major galactic wars due to either, a) saying it, or b) accidentally saying it. The only acceptable use of the word is in serious screenplays.
It is only in common use on one backwater world, where they don't know what it means...
Beta Ursae Minoris (place name): Beta Ursae Minoris (ß Ursae Minoris, abbreviated ß UMi, Beta UMi), formally named Kochab /'koυkæb/, is the brightest star in the bowl of the Little Dipper asterism (which is part of the constellation of Ursa Minor), and only slightly fainter than Polaris (Alpha Ursae Minoris) - the northern pole star and brightest star in Ursa Minor.
Bugblatter Beast (noun): The Ravenous Bugblatter Beast of Traal is a ferociously dangerous creature that hails from the planet of Traal, and will eat anything, especially Vogon grandmothers (whom Vogons will not save without orders signed in triplicate, sent in, sent back, queried, lost, found, subjected to public inquiry, lost again and finally buried in soft peat for three months and recycled as firelighters). To deal with a beast, one should wrap a towel around one's own head. This creature is so mind-bogglingly stupid that it assumes that if one cannot see it, then it cannot see said person. Despite this the Guide did state, erroneously, that ravenous Bugblatter beasts often make a very good meal for visiting tourists rather than ravenous Bugblatter beasts often make a very good meal of visiting tourists in its article on the planet Traal. This led to deaths of those who took it literally. The Guide's editors avoided lawsuit by summoning a poet to testify under oath that beauty was truth, truth beauty, and therefore prove that their claim, the more beautiful one, must be true. This led to life itself being held in contempt of court for being neither beautiful nor true, and subsequently being removed from all those present at the trial.
Desiato, Hotblack (proper name): Hotblack Desiato, front man and ajuitar player for plutonium rock band Disaster Area. Hotblack spent a year legally dead for tax purposes.
Coming of the Great White Handkerchief (noun): The Coming of the Great White Handkerchief is a time feared by most Jatravartids. According to the religion, the Handkerchief will be wielded by the Great Green Arkleseizure and used to wipe up the universe, a mere snotball in the scale of things. The Coming will, apparently, either cast the universe into a trashcan of nothingness or back into his nose, depending on his mood and the people’s faithfulness.
Damogran (place name): Damogran is a planet that is approximately 2,500 light years from Earth on the fashionable Eastern Side of the Galaxy. Due to being deserted it was the chosen location for the secretive construction of the Heart of Gold, and where Zaphod Beeblebrox arrived to reveal and subsequently steal the starship.
Damogran Frond Crested Eagle (noun): Damogran was home to the Damogran Frond Crested Eagle, which was known to make nests largely out of papier-mâché, from which it was virtually impossible for any of the hatchlings to break out. Like many species throughout the Galaxy, the Damogran Frond Crested Eagle had heard of the notion of survival of the species but wanted no truck with it.
Damogranian Pom-Pom Squid (noun): Damogran was also home to the Damogranian Pom-Pom Squid, a species with eleven tentacles and a thousand suckers highly skilled in massage. Pom-Pom Squids were generally hugely overqualified for their work in the spa industry, but were tempted away from their umpteenth doctorates by the lure of high salaries, plankton-rich pools and the chance of massaging a talent scout for the music industry and maybe getting themselves a record deal.
Disaster Area (proper name, trademark): Disaster Area is a plutonium rock band from the Gagrakacka Mind Zones and is generally regarded as not only the loudest rock band in the Galaxy, but also as being the loudest noise of any kind at all. Disaster Area is fronted by Hotblack Desiato and their best selling single was released on Earth under the band name PRISM and is titled Spaceship Superstar.
Earth (place name): Planet Earth, Sol III, according to the Hitch Hikers Guide to the Galaxy: ~~Harmless~~ Mostly Harmless. Earth was actually a gigantic super-computer built by the Magratheans (for a race of hyperintelligent pan-dimensional beings, the mice and designed by Deep Thought) as part of a ten million year experiment to find out the Ultimate Question to Life, the Universe and Everything (to which the answer is 42). Earth was destroyed by the Vogons five minutes before the end of the experiment. The only surviving Earthlings to survive were Arthur Dent, Tricia McMillan and two hundred colonists on the planet Nano, placed there by Zaphod Beeblebrox.
Electronic Thumb (noun): The Electronic Thumb or Electronic Sub-Etha Signaling Device was a device which allowed hitchhikers to flag down passing spacecraft to hitch a lift. Ford Prefect owned one of these and used it to get himself and Arthur Dent off Earth, moments before it's destruction, and onto a nearby Vogon spaceship. Successfully attracting a passing spacecraft depends on the proximity, sensitivity and active mode of the spacecraft's receiver, and the desire and willingness of the craft's occupants to put up with a hitchhiker for the next leg of their journey.
Flaybooz (noun): Flaybooz are small, highly intelligent gerbil-like creatures. Though flaybooz have no ears, they are extremely sensitive to vibration and can actually explode in extreme circumstances. Thor, the Asgardian and sometime rock god, held the record for spontaneous flaybooz detonation when he debuted his new tune “You Wanna Get Hammered?” from a chariot in orbit around Sqornshellous Delta. The record had previously been held by intergalactic rock stars Disaster Area, who dropped a speaker bomb into a volcano crater where the flaybooz were enjoying a static electricity festival.
Contrary to an almost universal norm, it is the male flaybooz who nurtures the young. A full-grown flaybooz can fit up to fifty young in his pouch, but generally there is only room for a couple, as males like to carry around a small tool kit in case of emergencies, maybe a few beers, and a copy of Furballs Quarterly.
Frogstar (noun, place name): The Frogstar system is a star system containing three known planets.
Frogstar World A (noun, place name): Frogstar World A is a friendly planet, home of the Frogstar fighters which took Zaphod Beeblebrox to Frogstar World B.
Frogstar World B (noun, place name): Frogstar World B, infamous home of the Total Perspective Vortex, is a planet said to be "the most totally evil place in the galaxy".
Frogstar World C (noun, place name): Frogstar World C is a beautiful planet home to great fishing opportunites and Gargravarr, the guardian of the Total Perspective Vortex.
Frood (noun) [compliment]: A really amazingly together guy.
Goosnargh [exclamation]: A Betelgeusian word used when you know you should say something but don't know what it should be.
Great Green Arkleseizure (proper name): The Great Green Arkleseizure is the creator of the universe, as claimed by adherents of the faith on planet Viltvodle VI. The Jatravartids of this faith believe that the Universe was sneezed out of the Great Green Arkleseizure's nose.
Han Dold City (place name): Han Dold City is a city on an unspecified planet, known for being fairly dangerous. It is where warring police tribes lay ambushes for one another, where bass players get machine-gunned for playing the wrong riff too many times, and where street prostitutes with degrees in sociology tell wealthy record company executives that it's actually okay for them to be rich.
Hoopy (adjective) [complimentary]: A really together guy.
Hikespeke (noun): Hikespeke is the corpus of Galactic Hitch Hiker's slang.
Joystick (noun): The Fallian albino marsh worm spends its life absorbing hallucinogenic gas from the marshes of Fallia. After it dies, it dessicates and turns into a stiffish, cigarette-like object. Hitchhikers call these joysticks. - One puff and you feel blissfully happy. Love everybody, forgive your enemies, all that stuff. - Two puffs will make you curious about just about everything, including the horrible death that is probably coming your way for you to have lit this baby in the first place. "This is going to be great," you tell yourself. "I am about to experience an energy shift to a new plane of existence. What will it be like? Will I make new friends? Do they have beer?" - After the third puff, your brain explodes and you feel a little peckish.
Kill-o-Zap (proper name, trademark): The Kill-o-Zap is a blaster ray gun which was wielded by the police from Blagulon Kappa when they came to Magrathea to arrest the fugitive ex-President Zaphod Beeblebrox. It was also wielded by the Second Officer on the Golgafrincham Ark Fleet, Ship B. The designer of the gun had clearly not been instructed to beat about the bush. "Make it evil," he'd been told. "Make it totally clear that this gun has a right end and a wrong end. Make it totally clear to anyone standing at the wrong end that things are going badly for them. If that means sticking all sort of spikes and prongs and blackened bits all over it then so be it. This is not a gun for hanging over the fireplace or sticking in the umbrella stand, it is a gun for going out and making people miserable with."
Light City (place name): Light City is the only city on Ursa Minor Beta and can only be reached by plane, apparently because the inhabitants want you to see the majesty of Light City as you fly by. It is where the headquarters of the editorial offices of The Hitchhiker's Guide to the Galaxy are situated.
Mattress (noun): Mattresses are friendly, dim-witted, docile creatures capable of speech. They are all named Zem and live in the swamps of Sqornshellous Zeta. Many of them are slaughtered, dried out, and shipped around the Galaxy to be slept on by grateful customers, though they do not appear to mind this, one noting that since they are all called Zem they never know which of them have been killed anyway. Many of the movements they make or sounds they produce, such as gupping, willomying and flolloping, are so unique that etymologists have driven themselves half-insane tracking down new words for them...
Megadodo Publications (proper name, trademark): Megadodo Publications are the publishers of the popular guide book The Hitchhiker's Guide to the Galaxy. It is one of the great publishing corporations of Ursa Minor, however it has a questionable reputation throughout the Universe.
Nano (place name): Nano (catalogue number MPB-1001001) is a dwarf planet located far out in the fringes of the Dark Nebula of Soulianis and Rahm. It was built by the Magratheans, who sold it to Zaphod Beeblebrox, who then sold the planet to Hillman Hunter, who paid for most of the planet, along with rich people he "led" back on Earth, before it was destroyed. The name Nano is the very same name Hillman Hunter called his grandmother. Nano is a Magrathean-made planet with three tribes, two of which were originally set up, with the third, the fitness trainers, coming from the Tyromancers and Nanite towns. Innisfree is the only continent on the planet, named by the Nanites' leader, Hillman Hunter. Hillman Hunter employed the god Thor to look after the Nanites. Nanites are registered as taxpayers with the Galactic Government, saving them from the Vogon ship which would have otherwise wiped out the Nanites, Tyromancers and the rest of the people on Nano. Tyromancers are the enemy tribe of the Nanites. They believe in the Cheese and are an alternate version of the Nanites themselves, as revealed by Zaphod Beeblebrox.
Nutrimatic Synthesizers (proper name, trademark): Collective term for various Sirius Cybernetics Food and Drink Replicators.
Old Pink Dog Bar (proper name, trademark): The Old Pink Dog Bar was a bar in Han Dold City that Ford Prefect was in when he discovered that his Guide had his full entry on Earth on it. On the bar was a parrot, which recited the names and telephone numbers of local assassins. There was also a disembodied arm which helped the barman both in serving drinks and in threatening people. It had belonged to the original owner of the bar. When he died he bequeathed it to medical science, but they didn't like the look of it so gave it back to the bar. Ford almost lost his breathing privileges after attempting to pay an extensive bar tab when the barman completely refused to take American Express cards as payment before, as a last resort, he offered a write-up in the Hitchhiker's Guide.
One who knows where (his) towel is (description, complimentary): Someone who knows where his towel is: formidable, a person to be reckoned with.
"Phreeow!" [exclamation]: A cry of astonishment or exclamation.
Photon (noun) [exclamation]: Hell, as in "What the photon is that?"
Photon Ajuitar (noun): A photon ajuitar is a super-sized remote controlled musical instrument slaved to the ajuitar played by Hotblack Desiato in the band Disaster Area during its sundiving concerts.
Playbeing Magazine (proper name, trademark): Playbeing is a journal devoted in roughly equal parts to galactic politics, rock music, and gynæcology.
Porm (noun) [sometimes derogatory]: Female genitalia.
Porm Wrangler, also Pormwrangler (noun) [sometimes derogatory]: 1. Male genitalia.; 2. One who wrangles or herds porms, (i.e. a pimp)
Prostetnic (noun, title): A Prostetnic is a class of nobility among Vogons. Only Vogons of Prostetnic class may command Vogon starships.
Quite Unwieldy Experimental Sublimation Torpedo (noun): The Quite Unwieldy Experimental Sublimation Torpedo, or QUEST for short, is an experimental anti-god missile used by Prostetnic Vogon Jeltz to attack the god Thor. The Vogons bought the device from Zaphod, who later revealed that he installed a lawnmower engine on it in a scheme to defraud them.
Reg Nullify and His Cataclysmic Combo (proper name, trademark): A band which performs at Milliways.
Robot (noun): 1: A robot is a mechanical or virtual artificial agent, usually an electro-mechanical machine that is guided by a computer program or electronic circuitry.; 2:The Encyclopedia Galactica defines a robot as "a mechanical apparatus designed to do the work of a man."; 3:The marketing division of the Sirius Cybernetics Corporation defines a robot as "Your Plastic Pal Who's Fun To Be With.&tm;"
Sass (noun): Know, be aware of, meet, have sex with (a person).
Silver-Tongued Devil (noun): Silver-Tongued Devils are small mammals indigenous to the Hastromil system. They are relentlessly exploited because of the usefulness of absolutely every part of their beings, from their hinged silver tongues to their very thought waves, which can be harnessed to an aerial and used to boost video signal reception if you live down a hole. The same philosophers who cite the Babel fish as proof that God doesn’t exist also cite the unfortunately initialled STD as proof that Satan does, an argument which even a potato with a charge running through it could see undermines their initial point.
Sirius Cybernetics (proper name, trademark): Hi-tech software and hardware manufacturer. Creator of Genuine Prople Personalities Firmware Apps.
Sirius Cybernetics Marketing Department (proper name, trademark): 1: According to the Hitch Hiker's Guide to the Galaxy: "A bunch of mindless jerks who'll be the first against the wall when the revolution comes."; 2: According to a copy of the Encyclopedia Galactica which fell through a rift in the space/time continuum from 1000 years in the future: "A bunch of mindless jerks who were the first against the wall when the revolution came."
Strag (noun) [derogatory]: A non-hitch hiker. (Possibly derived from straggler.)
Streetmentioner’s Time Traveller’s Handbook of 1001 Tense Formations (proper name, trademark): Dan Streetmentioner, also known as Dr Dan Streetmentioner, is a grammarian and the author of Time Traveler's Handbook of 1001 Tense Formations, a manual on the grammar of time travel.
Sub-Etha (noun): Sub-Etha (short form of sub-æther) is a form of superluminal communication, or faster-than-light communication network. It was used throughout the Universe as a way for hitchhikers to communicate with passing spacecraft and to ask to be let on board. Ford Prefect was known to use it to aid his interstellar hitchhiking.
Sub-Etha Sens-o-Matic (proper name, trademark): The Sub-Etha Sens-o-Matic is a device that alerts hitchhikers to passing spacecraft, by monitoring ships' Sub-Etha signals.
Teaser (noun): Teasers are usually rich kids with nothing to do. They cruise around looking for planets that haven't made interstellar contact yet, find some poor fool whom nobody's going to believe and buzz them.
Total Perspective Vortex (noun): The "Total Perspective Vortex" is a machine built on Frogstar World B with the intention of showing beings the infinity of creation, which became used as a method of torture. Zaphod Beeblebrox was subjected to the vortex and became the first person to survive it.
Ursa Minor Beta (place name): Ursa Minor Beta is a rich and sunny planet orbiting Beta Ursae Minoris, and one of the most popular holiday destinations in the Universe. It is always Saturday afternoon on this planet, just before the beach bars close - except for the few places where it is eternally Saturday evening. Thus, the locals always invite visitors to "Have a nice diurnal anomaly!"
Zaphod Beeblebrox (proper name): Zaphod Beeblebrox, or the Big Z, is a former President of the Galaxy. Zaphod stole the starship Heart of Gold when he was supposed to be launching it. Zaphod is travelling with Trillian, a human astrophysicist, and it is later revealed that Zaphod met Arthur and Trillian at a party on Earth in Islington. Arthur Dent and Zaphod's semi-cousin Ford Prefect later hitch-hike onto it. Zaphod has two heads, which can both function independently, and are known to interrupt each other when speaking. He also has three arms, and mentions that his third arm was added on to help with his ski-boxing. It seems that the third arm is part of his species that has an opt-in policy since he grows it back for Trillian. It also is the impetus for Zaphod being dubbed The Best Bang Since the Big One by Eccentrica Gallumbits. Zaphod states that the second head is the result of carving in his brain. Zaphod did this to conceal his true reason for running for President. Later, Zaphod has his second head (the more intelligent one) detached in a teleporter accident and installed in the Heart of Gold computer, supplementing Eddie. This leaves the still-attached Zaphod a little slower witted but it is noted that Left Brain (LB for short) being in charge of the ship has decreased the amount of accidents that would have been caused by Eddie. LB and Zaphod have developed a semi-antagonistic relationship despite still working with each other. After their adventure on Nano, they both begin working on Zaphod's presidential re-election campaign.
Zark (proper name) [exclamation]: Short form of Zarquon. Examples: "Zark!", "for Zark's sake".; (verb); To fornicate. Examples: "Zark off", "Zark you", "Zarkking fardwarks".
Zarquon (proper name) [exclamation]: Semi-divine being, a.k.a. Holy Zarquon, the Great Prophet Zarquon. Examples: "Holy Zarquon's singing fishes", "for Zarquon's sake".