Green’s Dictionary of Slang

1. (US) an informer.

1975		E. Torres Carlito’s Way 87: ‘Ten calma, Nacho, I’m expecting word any day now—I spread big bucks around with the chibas, then we grab all three’.
1977		E. Torres Q&A 151: It has been said that he is also a chiba, an informer.

2. (drugs, also cheeba-cheeba, chiba-chiba) high-potency marijuana; spec. from Colombia but used for any powerful marijuana.

1976		R. Sabbag Snowblind (1978) 82: An entire issue of Time Magazine rolled around almost half an ounce of Colombian chiba-chiba.
1982		Crash Crew ‘Breaking Bells’ 🎵 So get a high that’s better than chiba.
1986		Scholy D ‘P.S.K.’ 🎵 Copped some cheeba-cheeba, it wasn’t wack.
2001		ONDCP Street Terms 5: Chiba chiba — High potency marijuana from Colombia.
2003		J. Lethem Fortress of Solitude 432: Dose was one of his several mules; the others dealt ‘trees’ — tight-rolled Chiba stick, cut with mentholated tobacco to stretch the ingredient.

3. heroin.

1995		J. Stahl Permanent Midnight 73: The hefty Guatemalan lass who’d become my first full-time connection for chiba.
2013		J. Stahl Happy Mutant Baby Pills 14: I’d try to sit through Regis and Kelly without a bang of chiba [...] I couldn’t make it past Regis’s rouge without a second shot.