That point of intoxication you have reached during your night that can lead to a wonder of possibilities. Including, but not limited too, 1. forgetting where you are/who you came with 2. forgetting/not caring who you are leaving with 3. accidentally dropping your phone in the toilet 4. singing "karaoke" even though you know your singing is actually god awful 5. making decisions that you most likely regret in the morning, etc.
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.