Balls. When sitting correctly, a mans testes may cover the anus and becoming a 'mud flap'. Also, when two are engaged in intercourse in the missionary position, the mans testes may cover the woman's anus and therefore becoming the woman's 'mud flap'.
by saggy sack October 26, 2010
When someone defacates in a women's vagina and the women uses her pelvic floor to blow muddy bubbles from her rotten brown covered stank hole
by Standstiff November 03, 2021
A crusty penis that wasn’t washed after anal sex the night before.
- Commonly associated with symptoms of the DingleBear.
- Commonly associated with symptoms of the DingleBear.
After a night of Fireball shots and disorganized, loose fitting anal sex with the missus, Baxter woke up with a Rusted Mud Whistle.
by BangkokBobby March 01, 2019
When a man poops in between a woman's boobs. The man then licks his poop until it is a muddy consistency. The man then thrusts his penis through her boobs (resembling a mud bog). Finally when the man is reaching his climax he sticks his penis farther in her boobs reaching her mouth (or the finish line).
"Me and my girlfriend were doing it yesterday, and I forgot to go before. So then she proposed to do an Oregonian mud bog. At first I didn't want to, but after I reached the finish line I agreed!!
by Nachorique June 06, 2017
It's a form sexual act that consits of a female defecating while a male forces his genitalia in her rectal cavity.
Dude as i forced my dick up her ass, she took a wicked warm dump and that shit ran all down my balls it felt like i was down ridin' in them alabama mud holes.
by DirtyThrity January 15, 2010
When there isn't any toilet paper in the restroom you've just pooped in, and you have to make a dash with poop on your asshole to another one.
Corissa: Why are you out of breath, and, by Jove, what is that smell?!
Kevin: Sorry babe, I'm on a Mud Run.
Kevin: Sorry babe, I'm on a Mud Run.
by TheRipper19496 June 19, 2015
And upgraded form of tea bagging. This is done by covering one's own testicles in fecal matter before placing them against the face of the victim.
by Mistearea April 26, 2013