1. in US drug uses.
(a) a small pill of opium, costing 25 cents.
|Sun (N.Y.) 20 Oct. in Stallman (1966) 144: The ordinary smoker consumes 25 cents’ woth of opium each day [...] The ordinary smoker is satisfied with pinheads. Pinheads are about the size of a French pea.in|
(b) one who injects narcotics, esp. when using a rudimentary syringe based on a pin and medicine dropper.
|Amer. Tramp and Und. Sl. 146: Pinhead.–A drug addict.|
|Criminal Sl. (rev. edn).|
|Narcotics Lingo and Lore.|
|World’s Toughest Prison 812: pinhead – A drug addict.|
|Down Among the Meths Men 51: Pinhead Flynn and Sidney the Sod are [...] out on the rampage tonight.|
(c) an amphetamine user.
|Underground Dict. (1972).|
|[song title] Pinhead.|
(d) a very thin marijuana cigarette.
|Drugs from A to Z (1970).|
2. (orig. US) a stupid person.
|Artie (1963) 3: I’ve got as much right to go out and do the heavy as any o’ you pin-heads.|
|Comic Section N.-Y. American and Journal 21 Jan. 1: It is a frightful bore to children [...] sitting about with pin heads and gossips.|
|Lucky Seventh (2004) 262: He was a pinhead [...] And anybody knows that you can’t learn a pinhead nothing.‘Crossed “Signs”’ in|
|Inimitable Jeeves 86: The poor, misguided pinhead.|
|Gangster Girl 85: You’re no pinhead, Annie. That’s a pretty profound analysis.|
|Pat Hobby Stories (1967) 125: Miss Starheim has turned out to be a pinhead.‘No Harm Trying’ in|
|(con. 1940s) Veterans 109: Never mind, pin-head.|
|Ruling Class I xvi: He’s only a bleery-eyed blooster, an English pinhead.|
|Psychotic Reactions (1988) 230: Gobbing: [...] Listen ya little pinheads, it’s nauseating and moronic.in|
|Talk Radio (1989) 54: Your brother’s a creep and a pinhead just like you are.|
|Indep. Rev. 3 June 2: Another self-indulgent, over-privileged pinhead with a junk problem.|
|Nature Girl 169: What a fucking pinhead.|
3. (orig. US) a person with a small head.
|Two & Three 19 Mar. [synd. col.] At the height of 5,000 foot rulers all the players looked like pinheads.|
|Sons of Sawdust 219: Pinheads, freaks in a side-show .|
|Behind Bamboo 398/2: Pinhead, one with a small head.|
|Pimp 64: There was something familiar about that small pin head driver.|
|Et Tu, Babe (1993) 25: My heart went out to Joe — tiny mishapen ‘pinhead,’ flipper-like forearms.|
|(con. 1919) A Star Called Henry (2000) 279: And the best of Ireland’s freaks [...] pinheads, hunchbacks, dwarfs.|