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When a girl wipes back to front and pieces of poo get stuck in her pubes.
I was about to go down on this girl but I realized she had mad mud crotch, so I said, "hell nah, put your pants back on and get the hell out, bitch... unforgivable!".
by sir poop crumbles April 27, 2008
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2
when someone hasn't showered for a couple days, has done some serious sweating, basically been able to wash their crotch for an extended period of time
"Man, Jill was all about messing around last night but I had just got bad from the gym and had nasty mudcrotch"-Chris

"How was the camping trip?"-Chris
"Meh fine but after not showering for three days Stacy had some mad mudcrotch, and she kept wanting me to go down on her"-Rory
by ChirsM May 20, 2008
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