Runkybum

adjective/noun: 1. A flatulent backside; 2. a malodorous individual

1. Eating those six jars of past-their sellby date peanut butter has made you a proper runkybum! (also runkyarse)

2. You haven't bathed for over a week now, You're a proper runkybum!

by The Man from MilkTray April 3, 2010