Groundhog battle
Ground hogging is where a held in poop emerges in and out of your ass. A ground hog battle is the act of sticking two asses together and groundhogging. Hence where the poops are shoving eachother back and forth. The winner is is the one groundhogs the hardest and gets his/her feces in the opponents anus along with the defeated groundhog.
See also Groundhogging
See also Groundhogging
things got outta hand, a groundhog battle broke out