chira, n. — Green’s Dictionary of Slang

chira n.

also chicharra

[Sp. chicharra, a cicada; thus ? play on roach n. (2a)]

(drugs) marijuana or a marijuana cigarette.

[1960		C.E. Kany Semántica hispanoamericana 84: A [marijuana] cigarette is chicharra (‘butt’)].
1968		K. Dydyński Colombia 351: chicharra – street language for the butt of the marijuana cigarette.
1971		A.C. Ornstein Educating the Disadvantaged 202: The marijuana-tobacco combination called ‘chicharra’ is popular with Spanish-American users.
1971		Illinois Legislative Investigating Committee Drug Crisis in Spears (1986).
2001		ONDCP Street Terms 6: Chira — Marijuana.