Benjamin /ˈbɛnd͡ʒəmɪn/noun 1forms 1phrases 1 noun[in the plural]1 •(US, slang) A $100 bill, which bears a portrait of Benjamin Franklin.Fuck the past, let's dwell on the 500SL, the E&J and ginger ale / The way my pockets swell to the rims with Benjamins — 1994 formsBenjamins Phrases with Benjamin Benjamin ButtonTo seemingly age in reverse; to appear younger, either through changes in appearance or one's personality and lifestyle.