Green’s Dictionary of Slang

1. (US drugs) marijuana.

1952		Lannoy & Masterson ‘Teen-age Hophead Jargon’ AS XXVII:1 25: FRAJO (FRAHO) n. Marijuana.
1971		E.E. Landy Underground Dict. (1972).
1980		‘Gloss. of Drug Terms’ National Instit. Drug Abuse.
2001		ONDCP Street Terms 9: Fraho/frajo — Marijuana.

2. (US prison) a cigarette.

1992		Bentley & Corbett Prison Sl. 52: Frajos Cigarettes.
1993		L. Rodríguez Always Running (1996) 116: ‘Hey, homes, you got a frajo?’.