When you are talking with a friend online and you want to watch a video together. You both go to zero minutes zero seconds, so the time reads 0:00. Then you count down and press play after go (not on go). If you press play on go your reactions will be a second ahead and you'll ruin the illusion.
A: "Hey zero zero zero this movie with me."
B: "Dude you always pick the worst movies. Let's zero zero zero something I pick this time."
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?"