The walk of shame through a camping ground to empty your mud luggage (see definition) in the dump point.
Faye: Hey Ken?
Ken: Yes Faye?
Faye: The caravan toilet is full, you need to do a mud run.
Ken: Fuck!!
by Hastos January 20, 2021
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rubbing your bare butt on someone elses pillow, sheet, or blanket to leave poop trails.
Jeff got pissed off at Marcee and went mud running on her bed before dumping her ass.
by sarge2u June 20, 2008
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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.
by small mammal May 14, 2013
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When a person is taking a dump and a second person sits on the first person's lap effectively taking a dump between person number one's legs.
"Hey dude I gotta shit"
"Fuck off I am already grumpin"
"Bangladesh mud run mother fucka"
by skufd January 12, 2008
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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.
by TheRipper19496 June 19, 2015
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People you've been through the mud with, aka friends, could be more reliable or better companions than family.
Mud runs thicker than blood.
by Victor Torres from Cutler Bay November 27, 2024
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Dating a cop that has such bad breath and a rancid baby exit that you choose door number 3 to save your sheets.
I once dated a girl next to Kansas City that I had to do the Missouri Murry Mud Run on or risk having to buy new sheets.
by Fake Valor March 18, 2022
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