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1. jack taco
(1) adjective: meaning nothing or empty. Used by a specific World History teacher many times, and still gets a laugh from the naive children.
(1) "The Soviets had no idea that we were coming. They knew jack taco."
2. Jack taco
empty, containing or meaning nothing
Dude, we ate all of the pizza, there's jack taco left.
by Sarah Mar 10, 2004 add a video
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