The act of masturbating at high speeds to achieve climax in as little time as possible. Best used when you are unsure of how long you will be alone. Sound effects are encouraged but not necessary.
"She was only going to be gone for a minute so I powerbated and finished in 18 seconds. New personal best."
"So I made drill noises while powerbating. I felt like I was on a pit crew."
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?"