Taking your rock (fist) and using to punch a woman's taco (vagina) without making any actual penatration. in much the same way a heavyweight boxer would punch a heavy punching bag. one rock is acceptable, two is definately encouraged.
i gave her such a awesome taco rock last night, she needed 20 tampons to stop the bleeding.
by saycock May 31, 2007

5 Words Related to taco rock

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