Green’s Dictionary of Slang

duffy n.4

[a ‘tribute’ to former San Quentin warden Clinton Duffy]

(US prison) state issue tobacco.

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[US]Other Side of the Wall: Prisoner’s Dict. July 🌐 Duffy: State issue, flake tobacco once supplied to California prisoners under the brand name ‘Bonanza.’ Coined after former San Quentin warden Clinton Duffy. (archaic).