Green’s Dictionary of Slang

crystal n.

[resemblance]
(drugs)

1. (also crystal blow) uncut cocaine.

[US]F. Williams Hop-Heads 102: ‘Blackie’ pulled out a big knife and helped himself to two grains and a half of coke. ‘Japanese crystal,’ he said, squinting at the stuff.
[US]R. Sabbag Snowblind (1978) 62: Chop up the crystals, divide the pile into ‘lines’.
[US]‘Iceberg Slim’ Airtight Willie and Me 29: I appreciated the crystal blow and his plans to celebrate my birthday.
[US]J. Wambaugh Secrets of Harry Bright (1986) 46: She would never miss an ounce of flake or crystal or pot when she was sniffing luggage.
[US]ONDCP Street Terms 7: Crystal — Cocaine.

2. a term covering a variety of drugs of the amphetamine type, e.g. amphetamine sulphate, powdered methamphetamine, desoxyn.

[US]Reynolds & McClure Freewheelin Frank 56: Geezin crystal is an amphetamine trip. It is a good trip because it is a waker — an upper rather than a downer like heroin.
[US]R. Sabbag Snowblind (1978) 240: Called crystal by those on the spike, illegal methedrine is what most shooters mainline.
[US]J. Wambaugh Secrets of Harry Bright (1986) 7: The ether smell of ‘crank’ or ‘crystal’ was blown halfway to Indio the second it escaped the lab.
[US]Source Oct. 178: When I ask if he does any drugs, he answers, ‘A little bit of crystal’.
[US]C. Hiaasen Nature Girl 104: She’s finally off the crystal and dating a real-estate man.
[US]J. Stahl Pain Killers 242: The trio were [...] smoking crystal from a glass-bulbed pipe.
[US]J. Stahl Bad Sex on Speed 13: A rabbi would just appear [...] And it took this much crystal to see him.
[UK]‘Aidan Truhen’ Price You Pay 77: [I]magine a golf ball driven into wet plaster at ten paces by Tiger Woods if Tiger Woods was on a fucking appalling combination of steroids and crystal.
[US]D. Winslow ‘Broken’ in Broken 25: A bag of marijuana, a roll of bills and some crystal.

3. attrib. use of sense 2.

[UK]D. Jarman letter 21 Mar. Smiling in Slow Motion (2000) 101: Ronnie had a portfolio of nineteen-year-old nudes most of whom were crystal casualties.
[US]J. Stahl ‘Pure’ in Love Without 170: Some ex-con crystal freak who’s been jacking off to Chicks with Dicks for three days.
[US]L. Berney Gutshot Straight [ebook] [G]irls on crystal breaks clattering on high heels to the bathroom and back.

4. (also crystal flake) phencyclidine.

[US]L. Young et al. Recreational Drugs.
[US]H. Feldman et al. Angel Dust 124: ‘Crystal’, the purest form of PCP, is white [...] ‘Crystal flake’ refers to a slightly oilier, more liquid but relatively pure substance.
[US]D.E. Miller Bk of Jargon 337: crystal. 2. PCP.
[US]Microgram Bulletin XXXVI:8 182: On the street, PCP is commonly referred to as Angel Dust, Hog, Ozone, Rocket Fuel, Shermans, Wack, Crystal, and Embalming Fluid.

In compounds

crystal blow (n.)

see sense 1 above.

crystal flake (n.)

see sense 4 above.

SE in slang uses

In compounds

crystal bud (n.) [bud n.2 (3a)]

(US drugs) a potent variety of marijuana in which the flowers are covered with tiny crystals.

Zippy & Kelly postingp about Amsterdam coffee shops at HipTravelGuide.com 🌐 Went to Ricks last year for the first time and discovered their superb crystal bud.
crystal-gazer (n.)

a person who manages to make successful predictions; thus an intelligent person.

B.W. Fulsom ‘The Crystal Gazer from Crystal Falls’ on Mackinac Center for Public Policy 🌐 Known as the ‘Crystal Gazer from Crystal Falls,’ Emil Hurja was a local boy with a national impact.
crystal meth (n.) [it comes in a crystalline powder]

(drugs) crystal Methedrine.

[US]D. Gaines Teenage Wasteland 189: I spent several months cranked on ‘crystal meth’.
[UK]N. Griffiths Grits 46: A think uv Colm tellin me about the effects uv takin crystal meth with Columbian brown heroin.
[UK]L. Theroux Call of the Weird (2006) 130: Haley had been strung out on ‘crank’ – the street name for crystal meth.
[US]C. Hiaasen Star Island (2011) 20: Cherry had whimsically decided to try crystal meth.