Shit Taco Share definition Flag A shit taco is when u get a cup of coffee and u think that it is going to taste good and then it tastes terrible. This frozen carmel cappuccino from Dunkin' Dounuts tastes like a shit taco. Shit Taco by FattyFattyBoBoLatty October 15, 2009 0 0 Get merch Get the Shit Taco mug. Buy Now — $32.95 See more merch