Green’s Dictionary of Slang

(drugs) marijuana.

1959		J.E. Schmidt Narcotics Lingo and Lore.
1972		B. Rodgers Queens’ Vernacular 210: marijuana [...] our aunt Mary (camp, mid ’60s, fr pun upon gay sl aunt[ie] + dated narc sl Mary Warner = marijuana).
2001		Daily Tel. (London) 30 Jan. n.p.: May I interest you in some Aunt Mary? Or perhaps a little baby bhang? No, I can see, you prefer El Diablito. Or bambalacha? Juju? Laughing weed? Doobie, chillum, ganja, blue de Hue, black mo, ding, bud, leaf, Marley, pachalolo? Of course, how could I be so foolish, some rainy day woman? Still not with me? How about some skunk, righteous bush or, let’s be perfectly clear, marijuana?