poop willy Share definition Flag the act of inserting one's finger in one's anus, retrieving that finger, and then inserting the same finger in someone else's ear. Jane took it too far when, after recieving a wet willy from Jack, she gave him a poop willy. poop willy by Maxabillion August 1, 2008 0 0 Get merch Get the poop willy mug. Buy Now — $32.95 See more merch