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A girl who blocks the taco. Female equivalent of cock block
They were about do the dirty when..... taco-blocker called and ruined the mood.

She was about to make her move, but then a taco-blocker stole the scene.
by elleandbab October 15, 2008
someone or something that prevents the getting of pussy aka the taco.
God that kid Sams whiney attitude is such a taco blocker, he will probably die a virgin
by Joseph Diner August 04, 2007