1 definition by The Mosquito

A blow-job from a homeless chick. A combination of bum and hummer.
Guy 1: Dude, I heard you were seen in an alley with State-Street Stacy last night.
Guy 2: Yeah dude, she gave me a bummer in exchange for a KFC famous bowl.
by The Mosquito May 6, 2009
Get the Bummer mug.