First Coined in the last segment of S5E3 of Key and Peele
Used when you are going to do something really cool/be the coolest person around
For instance if you were at a party, and you're going to start dancing
'Imma jump in this party full dingle'
'Dayum, he gonna do some amazing shit up in here'
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.