Green’s Dictionary of Slang

acid n.1

1. (drugs) LSD, i.e. d-lysergic acid diethylamide-25 [a powerful, synthetic hallucinogen, based on ergot and discovered in 1943 by Dr Albert Hofmann of Sandoz Laboratories, Basel, and massively popularized in 1960s by Dr Timothy Leary (1920–96), Ken Kesey (1935–2001) and his Merry Pranksters, rock groups and the ‘alternative society’].

[US]Frank Zappa ‘The Downtown Talent Scout’ [lyrics] He’s just another of the kiddies freaking out / They pay him off in acid.
[US]K. Kolb Getting Straight 111: Those caps of acid he swallowed.
[US]E. Bunker Animal Factory 45: Pot, acid and mini-bennies were abundant.
[US]N. Pileggi Wiseguy (2001) 145: Lots of guys did their time on acid.
[UK]G. Burn Happy Like Murderers 335: If you don’t let me go I’ll give all the kids acid and they’ll all jump off the church roof.
[Aus]R.G. Barrett Davo’s Little Something 24: Kathy suggested he might like to [...] have[...] some aicd. Davo was just about to tell her where she could stick her LSD.
[UK]Observer Mag. 11 Mar. 14: In 1991 he was taking 50 tabs of acid a day.
[UK]G. Iles Turning Angel 157: You think they got the acid from Marko Bakic?
[Aus]Tharunka (Sydney) 9 Mar. 19/1: Don’t go there if you’re taking acid or smoking weed.
[UK]K. Richards Life 205: You had to be with the right people when you were taking acid, otherwise beware.
[UK]J. Fagan Panopticon (2013) 232: Fuck telepathy, I get that on acid — it isnae fucking cool.

2. attrib. use of sense 1.

[US]H.S. Thompson Hell’s Angels (1967) 244: The free-wheeling acid parties were already cause for alarm among the respectable LSD buffs.
[US]D. Gaines Teenage Wasteland 80: On a cool night you could build a fire and hold all-night acid vigils.

3. (W.I.) rum [joc. allusion to its strength].

[WI]F. Collymore Notes for Gloss. of Barbadian Dial. 9: Acid (sl.) Rum.
[WI]Allsopp Dict. Carib. Eng. Usage 9/1: acid. n. (Bdos, Guyn) [AF] 1. Plain rum. [Prob. due to the sharp effect of undiluted rum on the palate and throat].

4. (drugs) MDMA; post-early 1990s usage is historical.

implied in acid house party
[UK]I. Welsh ‘Smart Cunt’ in Acid House 276: I was struggling with the acid as well [...] These Supermarios, fuck me the whole world could be a hallucination.

5. (W.I./UK black teen) a special unit of the Jamaican police force, especially feared because of their severe tactics [? SE acid, possible use in torture; or ? acid n.2 ; but note ety. in cit. 1994].

US Department of State ‘Jamaica Human Rights Practices, 1993’ 31 Jan. [Internet] By mid-1993, however, the Anti-Crime Investigation Detachment (ACID) replaced Operation Ardent as the latest anti-crime initiative [in Jamaica]. ACID members were almost immediately linked to reports of summary executions.
VirtualTourist.com 25 Aug. [Internet] One beach party we went to turned into a riot and if it wasn’t for the ACID POLICE (fully armed riot police force) who acted quickly, there is no knowing what would’ve happened.

In compounds

acid casualty (n.)

1. one whose brain is deemed to have suffered from an excess of hallucinogens.

‘Captain Beefheart’ (Don van Vliet) in Changes mag. n.p.: Do I think I’m an acid-casualty or something like they talk about, I think not.
[US]Spin Mar. 25/2: ‘I think that I'm very, very sane,’ says Julian [Cope], long labeled a hopeless acid casualty, really off his box.
Daily Vault 10 Mar. n.p.: The only album to be released featuring early rock acid casualty Syd Barrett on lead vocals and guitar, this album defies logic and the senses – in fact, take the whole rule book of rock and throw it out the window.
h2g2 [Internet] If one frequently takes large doses of LSD – perhaps 12 blotters – one will become what is known as an ‘acid casualty’. This is someone who, possibly only temporarily, shows all the signs of taking too much LSD. Acid casualties have been known to recover.

2. the victim of an excess of MDMA.

zeitgeistfilms.com [Internet] Perhaps best known for his film role as the speeding Spud in ‘Trainspotting’, Bremner first appeared in the stage version of ‘Trainspotting’ as Renton. He stars in THE ACID HOUSE as the acid casualty Coco Bryce.
acid flashback (n.)

the recurrence of an LSD trip at some unspecified later date; the experience is assumed to be unpleasant.

NY Workshop in Nonviolence Win Peace & Freedom 32/1: A friend was busted for grass in Japan and took that opportunity to claim that he had an acid flashback [...] he was sent to the nearest psychiatrist at once.
International Journal of the Addictions XI:1–3 65: The best single predictor of acid flashback occurrence was marijuana use.
L.A. Due Give Me Time 275: She told herself she was hallucinating, having an acid flashback without ever dropping acid.
M. Dery Pyrotechnic Insanitarium 151: Marilyn Manson’s video The Beautiful People subjected the MTV audience to a bad-acid flashback of weirdos in leg braces, a fat man in bondage [etc.].
[UK]S. Maconie Pies and Prejudice (2008) 1: It’s like a coach driver’s acid flashback, lurid and random.
[US]D.D. Brazill ‘Lady and the Gimp’ in Pulp Ink [ebook] Abbott’s frankly barmy sermons were as famous as his acid flashbacks.
acid freak (n.) [-freak sfx]

(drugs) a regular user of LSD.

S. Holt Sex & Teen-age Revolution 74: John, twenty, who calls himself an ‘acid freak,’ seems always bright and happy, perhaps constantly ‘turned on.’ He [...] loves love and loves sex, and that LSD makes it all more exciting.
[US]R.R. Lingeman Drugs from A to Z (1970) 25: acid freak [...] (1) a user of LSD-25. (2) one who exhibits the dress, behaviour patterns, etc., of the LSD cult and whose behaviour is bizarre.
[US]J. Wambaugh Blue Knight 293: What’ve you got, boy? Bennies or reds? Or maybe you’re an acid freak?
[US]D.E. Miller Bk of Jargon 339: acid freak One who habitually uses LSD and exhibits bizarre behaviors resulting from its use.
[US]T. Willocks Green River Rising 69: A mixed bag of […] Angels, acid freaks and punks.
[US]ONDCP Street Terms 1: Acid freak — Heavy user of LSD.
acid-head (n.) [-head sfx (4)] (drugs)

1. a regular user of LSD.

[US]P. Wylie Esquire July 44–45: acid head — LSD user.
[US]J. Simon Sign of Fool 64: Frank was rapping shit [...] trying to convince everyone that the two ‘acid heads’ were a couple of lunatics.
[UK]J. Sullivan ‘The Yellow Peril’ Only Fools and Horses [TV script] D’you realise our mum’s grave is now going to become a beacon for every Satanist and acid-head in England.
[UK]Guardian Media 2 Aug. 3: The people doing this research were not acid heads, but they considered LSD to be one of the tools for experiment.
[US]ONDCP Street Terms 1: Acid head — User of LSD.
[UK]K. Richards Life 207: A couple of flying acid-heads who’d been up for a couple of nights.

2. attrib. use of sense 1.

[US]J. Rechy Numbers (1968) 203: Donovan slurring acid-head images about Superman, Green Lantern, and a velvet theme.
[US]W.T. Vollmann Royal Family 634: Old acidhead Californians.
acid house party (n.) [sense 3 above + SE house music + party; post-early 1990s usage is historical]

an illegal party, often held in a large building, such as a warehouse, usu. just outside a major city, where thousands of young people pay for entrance, dance to house music and, allegedly, consume MDMA and other illegal drugs.

[UK]Indep. 7 Nov. 2/4: Police fear Acid House parties [...] provide an ideal opportunity for professional criminals to sell drugs, particularly the ‘designer’ drug Ecstasy favoured in the Acid House culture.
[UK]D. Jarman letter Smiling in Slow Motion (2000) 48: Later we went to Derek Ball’s, who threw an acid-house party for a group of tipsy boys from Brighton.
acid pad (n.) [pad n.2 (2)]

(US drugs) a place where LSD is consumed.

[US]Chapman NDAS 2: acid pad n phr narcotics A place, esp someone’s home or apartment, where LSD is taken.
I. Israely America Sl. Dict. [Internet] English-Hebrew acid pad.
acid rapper (n.) [fig. use of rapper n.2 (6)]

(drugs) one who takes extra-large doses of LSD.

[US]T. Wolfe Electric Kool-Aid Acid Test (1969) 194: Acid rappers, freaks who made a competition out of who could take the most acid — they all seemed to end up loose in the head.
acid rock (n.)

a musical style allegedly influenced by, and purporting to recreate the sensations of, LSD and similar psychedelics; orig. in 1960s but underwent a minor revival in 1980s.

[US]Life 9 Sept. 68/3: But true ‘acid rock’ goes deeper psychedelically than just lyrics. It employs a monotonous, harshly amplified drone sound which can act as a psychedelic stimulus.
[US]T. Wolfe Electric Kool-Aid Acid Test (1969) 212: Through the [Grateful] Dead’s experience with the Pranksters was born the sound known as ‘acid rock’.
[US]Time 12 Jan. 38: College kids who have grown tired of the predictable blast-furnace intensity of acid-rock.
[US]Rebennack & Rummel Under A Hoodoo Moon 129: This marked the beginning of a whole mess of ‘acid rock’ sessions.
[UK]Guardian Rev. 12 May 6: A strong cultural link with progressive politics, acid rock and groovy domestic arrangements – in short, with the Revolution, man.
acid test (n.) [SE test; a pun on SE, accentuated by the contemporary slogan Can you pass the acid test? as a form of initiatory challenge. The original ‘acid test’ party, held in a San Francisco dancehall, was arranged by Ken Kesey’s Merry Pranksters group; the participants took LSD, many for the first time, and the event can be seen as the birth of widespread consumption of LSD]

a party.

[US]T. Wolfe Electric Kool-Aid Acid Test (1969) 278: Mostly I’d call the Acid Test a master production. Everything was very carefully meshed and calculated to produce the LSD effect.
[US]R.R. Lingeman Drugs from A to Z (1970) 26: acid test [...] Party at which guests wear bizarre, colourful costumes and clown make-up and dance randomly to the accompaniment of raga music or acid rock, while slides and stroboscopic lights are flashed on the walls, the intention being to mimic and/or enhance the LSD experience. [...] A punch containing LSD, called electric kool-ade, is often served.
acid trip (n.) [trip n.4 (1)]

1. the experience, often characterized as a ‘journey’, of taking a hallucinogenic drug, esp. LSD.

[UK]Mother Nov./Dec. 64: We are supposed to go on an acid trip tonight.
[US]Atlantic Monthly Dec. 146: He sometimes receives telephone calls from kids on bad acid trips thinking of suicide.
[US]N. Thornburg Cutter and Bone (2001) 20: They think their poor dear Maureen took one acid trip too many.
[US]E. Folb Runnin’ Down Some Lines 174: I’ve taken one acid trip, you know, to see what it was like, but I didn’t like it.
Recreational Drug Information Website [Internet] I’ve candyflipped once, and it was an incredible experience. The X gives its warm, loving glow to the acid trip and actually potentiates it a bit.
[UK]Indep. Rev. 7 Apr. 13: Tellytubbies is really a funky acid trip for warped playschool kids.
[US]G. Tate Midnight Lightning 3: Aliens from a planet with a purple hazy atmosphere, not an acid trip.

2. a dose of LSD.

[Aus]Lette & Carey Puberty Blues 113: Their mother’s Mandrax, Valium or an acid trip at four dollars a pill.
[UK]J.J. Connolly Layer Cake 117: Acid trips. He makes them. He’s a chemist for us.

In phrases

new acid (n.)

(drugs) phencyclidine.

[US]H. Feldman et al. Angel Dust 124: The large number of street names it has been accorded over the years: [...] new acid.
[US]ONDCP Street Terms 15: New acid — PCP.