Shooting off - the act of masturbation. Originally meaning to leave or go somewhere (e.g. men may go shooting off to outer space..., I've got to shoot off now, will talk later though), but has come to mean wanking.
It was really awkward when Garr walked into the room and I was shooting off.
Person 1: Any plans for this evening?
Person 2: Not really. Might go shooting off later.
Person 1: Ok. Remember to clean it up afterwards :)
When you're really screwing yourself up by entangling yourselves in others' affairs, being dysfunctional, and making your lifemuch more difficult than it needs to be.
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?"