When you and one of your friends are sittin in a Taco Bell and some dude is on a date with his girlfriend and she looks at you and your friend and her boyfriend looks back at you like you can't see him or something and he looks at you like "what the fuck are you looking at?!" You and your friend get up and both instantaneously punch him in the back of the head and knock him out in his food and walk out. His girlfriend wont say a word.
Grand theft taco refers to the loss of a young girl's virginity by the hands of a thief. If said girl has her cradle robbed, she is said to have been the victim of grand theft taco. The taco is of course referring to female reproductive organ...her cunt. See also vertical smile and axe wound.
Pablo Don Carlos was convicted of grand theft taco when he undoubtedly stole Sally's virginity in a hilariouslyhumiliating way.