A term used as an initiation to a fight, can regularly only invole 2 people, as a settle to a certain dispute using their fist or meelee weapons of choice in a somewhat dapper manor.
I do say we shall take it upon ourselves to as they say, brawl down?
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.