Top Definition
A large number of small denomination bills sandwiched between two large denomination bills, typically $1 bills disguised by a single $100 bill. Typically a Detroit bankroll is used to convey a false image of wealth. Dates to at least the 1960s in southeastern Michigan.
My friend flashed his Detroit bankroll and the door man allowed us to enter the club.
by Camp420Guy August 11, 2010

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