The act of having sex through the anus with a great chance of getting fecal matter on the penis of the male doing the insertion.
by Jon311 October 30, 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

When someone is fucked in the ass until they shit all over your dick. More often used as a colorful way to say "fuck you"
by Zygotes Zygoats Zygote's August 26, 2025
