The act of having anal sex with a sexual partner who has poop in between their buttcheeks, creating a taco-like resemblance, and ejaculating causing a creme effect.
The French made a lot, French toast, French fries, French tacos,etc.
When a female sticks their dirty,sweaty armpit in your face and your immediate reaction is to whip your dick out and protrusively fuck the girls armpit.
"Uhhhhhh, Dakota just gave me the meanest French Taco. Uhhhhhhh"
A French Taco is when you bend your partner over the couch and have him or her shit taco bell out while you use your tongue to push it back in repeatedly.