a person who joins a circle after a conversation has begun, and although the topic in point is irrelevant to them, yet they will annoyingly try to contribute and make themselves look like an idiot.
Henry buttleeched the conversation about Call of Duty, having been a barbie man all his life.
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?"