A Tennessee Mudball, is a variation on the classic Snowball, it's the act of getting head while the person giving the head has a dip of tobacco or chewing tobacco in their mouth. When the person finishes in the mouth, the sperm and tobacco is then "Mudballed" back into the recipients mouth. That's then guzzled down like a real man.
You're telling me, that having my wife knuckle deep in my pleasure hole as I prepare for the best Tennessee Mudball of my life is gay??? Well, I say this ain't my America anymore, Brother, and the communists have won!!!!
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.
when a large group of natives capture you, tie you up, and begin so slather mud/poop on your body,(commonly the penial area). after the mud/poop is slathered they bring in the tribe cheif who gives the victim a vigirous Hand Job.