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