Green’s Dictionary of Slang

(drugs) a $5 bill.

1954		‘Bop Dict.’ Mad mag. July 20: 5 dollar bill – Abe’s cabe.
2001		ONDCP Street Terms 1: Abe’s cabe — $5 bill.
2006		H. Trimm Forensics the Easy Way 320: Abe’s cabe: $5 bill.