The act of pooping in a girl's vagina and then eating the poop off of her shit covered muff.
i gave my girl a mud pie last night. It tasted like shit, but it was the best experience of my life.
When you give your girlfriend laxatives and then anal her.
Erick: yo i bough some laxatives today and was thinking about trying a mud pie
Josh: thats sick bro just make sure she gives you head afterwards
Erick: thats genius bro
A play on the sexual act called the cream pie, where instead of cumming inside of your partner, you spread whichever office you wish to make your Mud Pie in, and thereafter shit inside of it, and there you have a "Mud Pie"
My husband wanted me to give him a mud pie, so I asked what the hell that was... I never expected him to be into something so gross.
when u nut in someone’s ass and the nut mixes with there shit and then when they poop it looks like a pile of mud.
“yo last night my ass get railed and he nutted in me. few days later i had to shit and it was a mud pie.”
The act of eating dirty booty.
"Dude I just had Eli's grandma's mud pie last night"
- (V.) the act of riding, or goofing around in the bed of truck while it is offroading
"Dude we went wheelin' out at the canyon, and Matt was mud assing in the back!"
When your fucking a fat bitch in the ass and she shits on your dick and you slap it all over her face til she looks black
Landon: I gave lauren rothhandler a Indonesian mud slap last night, her face was all brown!