Friend 1: "I hate that guy he used to take my lunch money."
Friend 2: "Why don't you serterate in his coffee?"
*Serterates coffee *Unliked preson drinks coffee Guy:"This coffee tastes funny."
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.