Nipple Fart Share definition Flag 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 Nipple Fart by someone7877 February 20, 2011 0 0 Get merch Get the Nipple Fart mug. Buy Now — $32.95 See more merch