An extremely specific number that comes after 15771816492 and before 15771816494. In words: fifteen billion, seven hundred seventy-one million, eight hundred sixteen thousand, four hundred and ninety-three.
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.