SketchBounce 

The act of leaving the bar or party without informing your friends. Usually in a sketchy manner.

Hey Dave, nice SketchBounce last night! Did you go home with that handsome girl with the mustache?

SketchBounce by Rodneyhaus April 1, 2013

sketch bounce 

leaving a party/ bar/ club where your attendance was appreciated yet your absence will go unnoticed for at least one half hour. In order to perform this maneuver properly one mustn't say goodbye to anyone and exit while no one is looking. Also known as "sketching out".

He must've sketch bounced, again.

sketch bounce by Loganswifey October 26, 2010