Moo-tard [tardsauce] Share definition Flag A saying that is crossed between a cow and a tard. A really not good comeback. moo-tard tardsauce person 1: you're a shit-face! person 2: Yeah, well you're a moo-tard! Moo-tard [tardsauce] by jojo_my_mojo December 9, 2008 0 0 Get merch Get the Moo-tard [tardsauce] mug. Buy Now — $32.95 See more merch