mud balling 

The mutual passing of fecal matter from one person to another, through a passionate kiss.

Let's start mud balling till we puke!

mud balling by mud ball December 17, 2007

mud balling 

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.

"You goin' to let him get away with mud balling you?!"

mud balling by Mistearea April 26, 2013

Mudfalling 

(v)- The act of defacating on a person's face.

Jane was mudfalling on Joe.

Mudfalling by John Kellis Fernando January 5, 2007

Mudballing 

It is the scat equivalent of "snowballing" (which would normally happen with semen). It means swapping feces back and forth between two people's mouths.

Nile is a weirdo, he tried mudballing wih his gf before

Mudballing by Kyle Glue February 18, 2018

Mudballing 

When you poop into one's ass and they reciprocate the poop and it gains in mass as it travels back in forth.

Steve "I'm gonna poop in your butt."
Lindsay "I'm gonna poop it back in your butt"
Steve "Mudballing. Hawt."

Mudballing by Shadow Kunai June 15, 2011