Top Definition
When there isn't any toilet paper in the restroom you've just pooped in, and you have to make a dash with poop on your asshole to another one.
Corissa: Why are you out of breath, and, by Jove, what is that smell?!

Kevin: Sorry babe, I'm on a Mud Run.
de TheRipper19496 25 Iunie 2015

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When a man, gay or otherwise, has anal sex with at least 3 or 4 other men throughout the same day and night. Girls can be count as part of the mud run, but the one making the run is always a guy.
Guy 1: You guys wanna come over this weekend for a BBQ, some drinks and then maybe a mud run.

Guy 2: Ah, yeah, that could be fun. I've never done a mud run before.

Guy 1: You don't know what you're missing. You can even bring a couple of girls along, just not too many.
de small mammal 13 Mai 2013

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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
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