Top definition
N. the disgusting, bottom part of the muffin that, it would seem, was ignored in the delegation of yummy muffin ingredients like chocolate chips, blueberries, and nuts. They are most commonly discarded or left to rot on a lunch tray.
Stina Shall: Namie, why haven't you finished your muffin?
Lyme Ninja: Pft. I never eat the Muffinbutts.
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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2
A girl wearing tight jeans that causes said girl's lower back fat/love handles to look as if it were a muffin top making her actual butt the base of the muffin.

by passima December 30, 2008
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The Urban Dictionary T-Shirt

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3
"God damn it my girlfiend wont stop calling me muffinbutt!"
by Chrisge March 17, 2008
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Donkey Punch Plush

10" high plush doll.

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4
A girl who while sitting down is extremely hot, but when she stands up here ass is nasty huge like the top of a muffin.
by Joe January 13, 2005
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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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