Top Definition
(noun) The true evil among butts!

Comes in mostly darker shades with loose, mushy skin and has a foul smell reminiscent of flatulence and a freshly decayed corpse.
I pounded her monsterbutt with my 9 inch nail until we could hear the birds sing in the morning.
by Quakeulf January 13, 2006
6 Words related to monsterbutt

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