When you have uncontrolable bowels...aka Diarrhea.
I went to Pancho's Mexican Buffet, and before I could get to the table, I have an onset of the mudbutts... I seriously shit my pants.
by SnakeFight! April 22, 2006

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An uncontrollable bad case of diarrhea that feels as if mud is oozing out of your ass.
After drinking a case of beer and eating some bad Mexican food, I got a severe case of mud butt.
by toast455 July 05, 2005

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The mixture of semen and fecal matter inside the anus
I busted all up inside of Rebeccas ass. Pulled my dick out and had mud butt all over it! Unforgivable.
by Robotcitizen February 24, 2015

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When you take a large shit and have to use like half a roll of toilet paper because your shit is like sticky tar. Shit smears instead of wiping off. When you wipe it gets messier before it gets clean.
Mud butt is the #1 cause of skid marks
by Michele_plus_one August 05, 2016

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a severe case of diarrhea.
My friend Kris ate bad sushi last night and today he has mud butt.
by EVCESQ January 26, 2007

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The Urban Dictionary T-Shirt

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horrible runny shyt; anal leakage
::WARNING::
Eating WOW potato chips may cause mud butt.
by Bongwater April 15, 2004

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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Mud butt is just another term for "Diarrea".
You chugged a bottle of soy sauce?

-Yeah.
Your going to have a serious case of mud butt, very soon.
by Nicsta July 31, 2009

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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