mud-buggying 

The act of making an engine noise while sticking your face between two butt cheeks.

When that stripper bent over, I buried my face in the crack of his ass and started mud-buggying those beautiful butt cheeks!

mud-buggying by Dalebert May 17, 2012

Mud bugging 

The act of "blowing ones load" inside the rectal cavity of another. Immediately thereafter you suck or slurp the load out of the anus.

The optional add-on is to then spit the ejaculate into your partners mouth.

I got into a weird mud bugging scenario with Tara last night. Needless to say I'm out of scope.

Mud bugging by Eventide October 21, 2010

Mudbugging 

Similar to motorboating, but done between someone's ass cheeks. When someone places their mouth between someone's ass cheeks and then shakes their head violently while making motor sounds with their lips.

As coined in Episode 86 of the Wheels Off Liberty podcast by one Jamie Crane.

I've been mudbugging so much that I can't even smell shit anymore!

Mudbugging by XOmniverse November 14, 2011