When one becomes very high they may suddenly feel the urge to put two random words together and act as if they make a thought.
Person 1: Dude I am so high!
Person 2: Oh really, good for you
Person 1: I know I love it...oh hey did you do that homework?
Person 2: Yeah, what homework do you need?
Person 1: GHOST PENIS!
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?"