When you see a dude who's hitting on some hoes when he's really drunk and you just gotta call him out without the girl/girls noticing whats all going down cuz as good as they look in the moment the next morning he'll be thanking you.
Hey dude why are you skeezin on these beezies? You can do so much better man, your just drunk as fuck
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?"