Green’s Dictionary of Slang

1. a large supply of narcotics.

1950		Goldin et al. DAUL 28/1: Bingle. Narcotics.
1953		Anslinger & Tompkins Traffic In Narcotics 303: bingle. [...] drugs.
1957		E. & S. Deak Grand Dictionnaire d’Americanismes.
1960, 1975		Wentworth & Flexner DAS.

2. a drug seller.

1950		Goldin et al. DAUL 28/1: Bingle. A purveyor of narcotics to addicts.
1953		Anslinger & Tompkins Traffic In Narcotics 303: bingle. A drug peddler.