1. When the vagina gets hard,horny through sexual arousal usually by stimulation or during foreplay.

2. When a vagina gets hard/horny/aroused and it resembles a "hard taco"
Example.
1. Amber got a hard taco when she rubbed up against Daniel's leg

2. Susy got a hard taco when she kiszed Dave

3. When madison was horny, she had a hard taco
by xjaovsieer November 10, 2008
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When someone say's something stupid or a false statement, the person listening is able to call a "bonus hard taco" which means that you are able to hit the person twice on the sholder and once on the back of the head.

Rules that apply:

1) If the person calls "late!" before you are able to say "bonus hard taco" you are not permitted to give them a bonus

2) The other person is able to call whether it's a "bonus HARD taco" or a "bonus SOFT taco" (when something said isn't VERY stupid, it's a soft taco)
by interactivebabe!!@ June 13, 2010
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The equivalent of "Morning Wood" Hard Shell refers to the hardened clit and Taco refers to the vagina.
"I woke up with a major Hard Shell Taco today."
by something_else February 21, 2015
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