A variant or abbreviation of benjamin; sometimes used as slang for a $100 bill (from Benjamin Franklin's portrait) or for benzene in street drug terminology.
From benjamin or from Benjamin Franklin. Used informally in various contexts, particularly American English slang from the 20th century onward.
Benj shows how slang creates shortcuts—just like 'Ben' is short for Benjamin, 'benj' emerged in street slang to refer to $100 bills because Benjamin Franklin's face is on them, connecting currency, names, and commerce.
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