A timestamp that people randomly put on porn or otherwise sexual videos. Usually, these timestamps can be found on tons of feet and shoe-play videos, but most notably, school shoe-play videos, because for whatever reason someone thought it would be a good idea to put a camera in the back of a classroom and then upload it to YouTube for creepy and wrinkly old folk to jack off to.
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?"