A term used on FaceBook. Post "why whassup?" as your status and when/if people like it you leave a message on their wall. The message is how you would describe this person if someone asked you if you knew him/her.
Jane(status): Why whassup? -17 likes-
Jane: John? John Smith? The funny one? The one I have a crush on? ;) The cute one with the dimples? The one who always has my back? The one with the amazing mom? Yeah I know him. Why whassup?