A fish burrito is when you roll a girl(who hasn't showered) in a blanket just like you would roll up a burrito. After this is done you insert your head into the bottom part of the "burrito" and eat out her fishy smelling vagina.
Guy- This chick i met has the best fish burrito's ever. She even had tartar sauce on that shit.
Guys friend- Uhhhhhhh I think that was the hooker I banged last night. I left a little bit of a mess.
Guy- ohhhhhh so that's why it was sticky (throws up)