guy 1 'How'd it go with that girl you left the party with last night?'
guy 2 'We made out for a bit then did a shanbunny in the tree out the front of my place'
guy 1 'Fuck yeah mate good job'
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.