Ummmtaco Share definition Flag An extremley annoying word to aggravate Sander. "Hello" "Ummmtaco!!" "stfu i know who this is" "Ummmmtaco!" "Dont you have a life?" "Ummmtaco!" Ummmtaco by StevenGary April 26, 2009 0 0 Get merch Get the Ummmtaco mug. Buy Now — $32.95 See more merch
