My friend once taught me that when you shove your penis deeper in a girls mouth just before climax so that when you cum it goes out her nose, she gets super mad and it's called the milk breathing dragon. This was new information to me so I had just been sexducated.
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.