Top Definition
The lock of bum hair that surrounds the anus that when taking a shit becomes spackled with poo paste, making wiping a blivet of a situation. Poo paste is then dobbed onto the toilet paper during wiping, much like applying Kiwi to your leather boots.
Man, I hate mudbutt! I've been wiping my poo dobber for hours!
by Blivet Spill April 01, 2009
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