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To be show-offy, narcissistic, pompous
"You know that girl who always wears those abercrombie and fitch clothes and rides a BMW to school? Yeah she's so pompy."

"Oh man. Peter always thinks he's right about everything. He's so pompy!"
by annonymousranchous September 14, 2003
an ass. another word for booty.
man she has a nice pompy.

damn that pompy is THICK.

whoa loook at that pompy go!
by jeffin March 28, 2005