Green’s Dictionary of Slang

A n.2


1. LSD, i.e. d-lysergic acid diethylamide-25 [abbr. acid n.1 (1)].

[US]E.E. Landy Underground Dict. (1972).
[US]L. Young et al. Recreational Drugs.
[US]ONDCP Street Terms 1: A — LSD.

2. amphetamine.

[US]R. Bronsteen Hippy’s Hbk.
[US]D.E. Miller Bk of Jargon 336: A: Amphetamines.
[US](con. 1930s–60s) H. Huncke Guilty of Everything (1998) 289: A guy would come up with thirty or forty dollars to cop an ounce of A.
[US]J. Franzen Corrections 490: Inside were thirty golden pills. ‘My God.’ Denise laughed. ‘Mexican A.’.