Top Definition
a word used to show disbelief about someone.
Person 1: I spent last night with sarah michelle gellar!

Person 2: AW HUMM.

Person 1: It's true!
by stickywulf November 12, 2005
To throw an object with a snap of the wrist side arm, applying a spin to the object. Making have the force to hit something and bounce off it.
"I'm gonna fucking humm this at tyson"
"A fuck! My eye!"
by oojuu March 24, 2003
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