a stupid ass who talks and talks and talks until you want to bang their heads against a wall. most of what they say makes no sense and there is no way of getting out a conversation with said stupid ass.
god, shelly is such a blathering idiot. she doesn't shut up!
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.