Green’s Dictionary of Slang

(US prison) cocaine.

1935		A.J. Pollock Und. Speaks.
1949		Monteleone Criminal Sl. (rev. edn).
1959		J.E. Schmidt Narcotics Lingo and Lore.
1960, 1975		Wentworth & Flexner DAS.
2001		ONDCP Street Terms 5: Cecil — Cocaine.