When oral sex is performed on a man with fecal matter in the giver's mouth.
Jack is so in to fecal play that he and Jill have been mud stickin' lately.
When your partner, takes a steaming dump on your face, and you smear and wear it like a mask to exfoliate the skin.
"Rachel gave me a himalayan Mud bath last night, now my cheeks are softer than a babys bottom"
When you have a case of sickness and everything you have taken in or are taking in via mouth, evacuates itself out your ass in a watery, muddy consistncey for a lengthy period of time.
'After eating that seafood I had a serious case of the Viral mud butt diet!'
Or
'I knew the flu was going around, and it hit me hard with a case of the Viral mud butt diet.'
A hand-job where shit is used as lubricant.
Your mom gave me a mud-job last night! It stunk!!
An anus.
She only let me hit the mud raisin because she said she was a virgin.
The viscous secretion from an unclean greasy butthole.
I pulled out of chad and my dick was covered in his Louisiana mud.
When you are having anal sex and you get feces on penis.
I was doing her doggy style and pulled out and she gave me a mud turtle.