dinkie dow, n. — Green’s Dictionary of Slang

dinkie dow n.

also dinky dau

[play on US milit. pidgin dinky dau, crazy (orig. Viet. dien cai dau, he is mad); imported by US troops in Vietnam (1964–75)]

(drugs) marijuana; also attrib.

1975		Hardy & Cull Drug Lang. and Lore.
1982		Abel Marihuana Dict.
1987		(con. c.1967) J. Ferrandino Firefight 33: I bring. You wait. Number-one dinky dau smokes, Joe.
2001		ONDCP Street Terms 7: Dinkie dow — Marijuana.