The term used to describe the act someone who works in a Lab testing peoples Faeces would engage in. Some more modern labs use little spades to transfer specimens, but this term is for the old fashion and hard core Labs.
by Jebusmoore October 19, 2007
An effeminate homosexual male bottom with poor anal hygiene who partially defecates during anal sex.
Lance is such a Muddy Mary. Every time I fuck his ass he whines like a school girl and stinks like an open asshole.
by Matt Whipple December 30, 2008
When you fuck a girl in the ass so balls deep, that her shit gets all over your scrotum. You don't notice the wet shit on your sack until you look down. It's quite shocking.
Unlucky Dude: What the quack, Kacie? Your mud is all over my hairy ballsack!
Kacie: It's your own damn fault for penetrating my asshole so gosh darn deep!
Unlucky Dude: Well now I have a Muddy Duckskin...thanks a lot!!!!
Kacie: It's your own damn fault for penetrating my asshole so gosh darn deep!
Unlucky Dude: Well now I have a Muddy Duckskin...thanks a lot!!!!
by Perv Tycoon February 04, 2014
by matt13 April 02, 2008
The act of smearing poop on one's pubic hairs, then proceeding to have anal sex with a girl where the poop gets rubbed on her ass.
by jimmy jibberish November 16, 2007
by punkscum August 15, 2013
*man walks in on his wife cheating on him*
Husband: CANT BELIEVE YOU DID THIS BITCH, YOU LET HIM MUDDY FUCK YOU DIDNT YOU?
Husband: CANT BELIEVE YOU DID THIS BITCH, YOU LET HIM MUDDY FUCK YOU DIDNT YOU?
by CreepinT9X May 27, 2009