poopy alligus Share definition Flag its when your mom is mean to you, its what you call your mean mother so you don't get grounded. "Sweet child, eat your brussel sprouts" "Mommy you are a poopy alligus!!!!!" poopy alligus by Josh and Shannananana April 21, 2007 0 0 Get merch Get the poopy alligus mug. Buy Now — $32.95 See more merch