When your talking with a girl you like and she suddenly becomes a bitch so you then you ask her to tap and she says yes but you end up just MMA fighter her in the middle of sex naked and she flicks your balls so hard they malfunction and continuously cum everywhere.
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.