oral sex face
It's a symbol for "eat me" ... but usually not in a literal sense. It's not an invite to peform cunnilingus, I mean, but more like flipping the bird. Not in an actual "f*** you" way, but to be a jackass on purpose.
The peace sign part is a symbol of a girls legs the tongue refers to a person giving ideal to a girl! It maybe that they want it!
An aliens mouth sticking its tongue out duuh!