A sexual activity that defines a man putting his genitalia into his partner's anus as they are excreting. The goal is to completely plug the hole and effectively win the "tug of war." If any excrement squishes out, the man loses and is covered in "mud."
"I heard Jon is pretty good at Muddy Tug of Wars"

"No, I beat him last night, and he was super muddy"
by TugOfWarChampion August 14, 2016
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Using feces as a lube for masturbation.
When he ran out of spit Larry knew he might have to resort to a muddy tug to finish pumping one off.
by Marco Porno July 21, 2015
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