certain thing that you say before you go to bed at night. you say it before you go to sleep, and you pretend that it is morning in a high and obnoxious voice. you say "hey" before using the term "schmeely".
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.