when a female is licking a dudes sweaty man balls, and the sweat from his balls starts to bead up on her top lip. Then she proceeds to lick it off, seductively, while rubbing her temples singing 'happy birthday'.
"Yo, lets go to that party."
"Hell yeah, I'm trying to get that good bircake."
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.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"