When you put both balls into a girls (or guy's, we don't judge) asshole and s/he farts them back out. A satisfactory "pop" can be heard if done correctly
by EDKirk February 14, 2012
When a female agrees to tuck a males scrotum into her anus, fart, and toss the scrotum like a pair of marbles through the air .
Man, Brenda sure does know how to give a great Chillicothe Marble Toss . I'm still feeling it today !
by Deathdakidd July 4, 2016