1. To approach a stranger and slowly rotate your hips while crossing your arms across your chest in a mummy-like fashion and yelping "Nump!" in a high-pitched voice. Inspired by the two legends, Butch and Mummy fart.
2. The act of numping.
2. The act of numping.
by NumetalFag July 09, 2009

by NumetalFag July 09, 2009
