Exhibitition (often via a photo or video) of the breasts and/or cleavage of a woman, in such a manner that her identifying features are not visible, but are obscured or omitted, so her identity remains concealed.
Lady: "Posting a selfie of my boobs online could get me in hot water - I had better make sure I keep my face out of the shot to maintain my anonymititty."
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?"