3 definitions by Joey Provalone

1
A result of an unintentional bowel movement. A single pebble of feces resembling the texture of popcorn shrimp.
While getting blown I accidentally bounced an ump off her chin.
by Joey Provalone January 24, 2003
Get the mug
Get a ump mug for your bunkmate Beatrix.
2
Slang: synonomous with asshole. Mainly because a normal tight sphincter resembles the inside of a knot made on a baloon.
Hey ... last night I popped her right in the baloon knot.
by Joey Provalone January 24, 2003
Get the merch
Get the Baloon Knot neck gaiter and mug.