Top Definition
The act of being a worthless, annoying, prick who is slightly nerdy and/or dorkish.
Dude1: Hey man did you hear that jacob is dating Katy.

Dude2: Yeah he's a Nipple Fart
by someone7877 January 30, 2011
An involuntary release of gas coming from a magical hole in your pruney purple nipples.
" oh shit he was feeling me up and then i had a nipplefart. totally killed the mood"
by shlizzard January 07, 2010
when your nipple produces a high pitched , highly embarrasing squeak
oh shit! a nipple fart right in public , OH GOD STOP STARING AT ME!
by Morkman29 April 11, 2006
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