Used as a greeting between posh shoreditch/d4 head twats who are trying to be "down with the lingo" and think that using this sort of language gives them a cool gangsta lean.
d4head1: Yo yo yo, what's the beef !
d4head2: Mellow.
d4head1: Cool bananas.
d4head2: Lets split this joint, jump in the whip!
d4head1: Shotgun! nigs! no joust !
d4head2: Mare, im always in the back !
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.