a thin mustash usually common of mexicans and younger teens that just began growing facial hair. also known as a "taco stash" as opposed to just "taco"
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."