Green’s Dictionary of Slang

(drugs) marijuana.

1936		D. Maurer ‘Argot of the Und. Narcotic Addict’ Pt 1 in AS XI:2 119/1: bo-bo-bush. Marajuana [sic].
1949		Monteleone Criminal Sl. (rev. edn).
1953		Anslinger & Tompkins Traffic In Narcotics 306: bo-bo-bush. Marihuana.
2001		ONDCP Street Terms 4: Bobo bush — Marijuana.