Top Definition
n. Any male indidvidual that wears a gym sock in place of a condom while engaging in anal sex with a partner that suffers from diarrhea.
Jerry is a Mudrunner on the weekends.
by Chris/ Tom October 24, 2006

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Lotsa space for your liquids.

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When a person believes that they are still a virgin if they only have anal sex.
Hey man did you know that Jane is a mud runner?
by Nabik June 29, 2011

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

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

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

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

Buy the t-shirt