mustard taco Share definition Flag A general discription of a woman’s disturbingly unclean vagina. Usually found on a one night stand. That chick from the party took me up to her room, but she had a mustard taco so I bailed. mustard taco by Listerfiend May 20, 2018 0 0 Get merch Get the mustard taco mug. Buy Now — $32.95 See more merch