GAFS an acronym for, "Good As Fuck Sandos" or "Good As Fuck Sandwiches." A gourmet sandwich shop in Taos, NM USA first commercially used this word for its business in early 2018. The word is an extension of the variation GAF, "Good As Fuck" usually used to describe food.
"Yo! Call Tyrone, tell him we are coming over and he needs to be making some of those GAFS. Cuz' we hungry as fuck."
That church picnic had some GAFS.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"