The act of pooping in a plastic bag, swinging it around like a mace, and smashing it into the side of someone's head.
Dude, last night out in the woods, some crazy homeless guy hit me with a german dome rocker, i took two showers but it still didn't get the smell out...
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.