a relatively incurable disease of the personality where no one knows as much as you, and must continually be told this. The only known cures are lobotomy or 38 special.
At the Directors annual physical the md found a very advanced case of arrogantasis. This explained why the Director spent a good portion of her time having to correct everyone else and was continually hoarse.
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?"