To spread a rumor which may not be true. Taken from Tom Segura’s anecdote about his dad and Tommy Lee Jones, where he finds out that he has incorrectly been telling people that Tommy Lee Jones is gay because Tom’s father misinformed Tom
I don’t want to out Tommy Lee Jones here, but I heard that John is having an affair
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?"