Top Definition
1. When your boyfriend is fucking you anal and suddenly thrusts as hard as he can causing you to scream in pain/pleasure.

2. The act of casually fucking your girlfriend in the ass when suddenly thrusting as hard as you can.
Jeanine: Oh yeah, oh yeah, oh yeah do it baby.
Luis: -thrusts really hard-
Jeanine: OUCH! Luis did you just give me a buttpow? Douchebag.

Jeremy: -slaps Madeline's ass really hard while having sexual intercourse-
Madeline: Jeremy stop buttpowing me or I'll stop letting you do anal on me!
by Comedyskank September 27, 2009
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