What is Zesty Taco?
1.
Performing cunnilingus on a woman with a yeast infection.
John: "Whew, you have one zesty taco!"
Jane: "Oh sorry, I forgot my daily swab."
See
2.
The act of taking a crap in a girls vagina and then eating her out
"Dude, it was so nasty she made me use the zesty taco on her."
See