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!".
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
"Mehfine but after not showering for three days Stacy had some mad mudcrotch, and she kept wanting me to go down on her"-Rory
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."