When someone is bothering you, on purpose, and won't leave you alone when you are trying to get something done, they are assturbing you. As in, they are disturbing you, and being an ass about it.
In an wordFPS game, killing an enemy player from behind, often after some following. Since the enemy does not know about the threat and thus becames an easy prey. Considered as lame behavior.
Your in a bathroom stall, but instead of shitting in the toilet you shit on the floor, ceiling, and walls, and end up puking in the toilet but missing.
Pretty much, you get your shit all over the fucking place. And not the fucking place it should 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?"