Ostensibly the female version of a
taco. It's not an actual word in the Spanish
dictionary, but it's a fun way to confuse your Spanish-speaking
friends.
Person 1: "¿Quieres venir a mi casa a comer
la taca?"
Person 2: "¿Qué es la taca?"
Translation:
Person 1: "Do you want to come over to my
house and
eat la taca?"
Person 2: "What is la taca?"