When someone displays bum-like qualities.
Taylor: That guy just stole some free samples.

Bill: Ya, he's bummin'.
by Dranard January 29, 2011
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To do someone from behind "Doggy Style"
or want to do someone Doggy Style
I want to be bummin Fergie or someone of equal looks
by LilJOnwhattt: July 19, 2005
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A word people say when they have small dicks
-dude, I was bummin' it the other say.

-then you must have a small ass dick.
by Baldy415 December 29, 2010
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Man 1: "you coming to the pub tonight ?"

Man 2: " No mate but i'm bummin the Mrs tonight."
by Chris Bates December 1, 2004
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The act of bumming another man for non sexual reasons
Nick loves women but is not against a bit of straight bummin'
by Skrurk November 17, 2022
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