A Jelly taco, is simply a vagina during it's menstral cycle. If a female were to be having her period, she and/or her vagina would be referred to as a Jelly Taco.
"Yo did you hook up with that chick last night"
"Nah dude, shit was jelly taco didn't go near it."
by BonelessWingsLax February 22, 2008
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It's when you put grape jelly on you penis and have intercourse with a woman. Then you eat her out.
Joe:Yo man you wanna help me make a grape jelly taco?
Emily:Sure lets go to the store.
Joe:No man not that kind.
Emily:Oh okay ill go to the kitchen.
by xXN0XSK0PEX69X420Xx November 20, 2013
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