To double up on beverages, usually alcoholic. When one is double parked, the subject will have both drinks in front of them, and will either alternate between them or store one for later. This tactic is often used to minimize trips to the bar. Not to be confused with double fisting, which is entirely misleading.
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.