Green’s Dictionary of Slang

(drugs) a mixture of marijuana, cocaine, heroin and phencyclidine.

2001		Daily Tel. (London) 30 Jan. n.p.: May I interest you in some Aunt Mary? Or perhaps a little baby bhang? No, I can see, you prefer El Diablito.
2001		ONDCP Street Terms 8: El diablito (Spanish) — Cocaine, marijuana, heroin and PCP [...] El diablo (Spanish) — Cocaine, marijuana and heroin.