Facebook exhibitionist 

Someone who posts on their girlfriend/boyfriend's wall to express their love in an inappropriate, sickly way, knowing full well that the message will appear on all of their mutual friends' news feeds.

Maybe for attention, maybe to make everyone feel bad because they are obviously the ultimate couple, but one thing is for certain; the world would be a better place if they just IM'd the damn message.

Can also be applied to close friends of the same gender who enjoy gaying each other up in public, despite being straight.

Guy #1: Damn, Steve, stop commenting on yo' girl's Facebook wall! She's gonna think you're clingy.
Guy #2: Plus you're annoying pretty much everyone who knows you both. Get a room and stop being such a Facebook exhibitionist.
Steve: WHY MUST YOU TRAMPLE ALL OVER OUR LOVE?!

Facebook exhibitionist by Nottel Inyu January 13, 2011

Facebook Exhibitionism 

When a person shares too much personal information on facebook, whether it's to draw attention or to make him/her feel important. Like other people even care about that stuff! Stop! It embarrasses your family, you big doof!

Evette felt as though no one in her house or school paid attention to her so she turned to her computer. As her psychologist explained, Facebook Exhibitionism is not a way to solve an inferiority complex, and it's a treatable disorder.

Facebook Exhibitionism by p j g January 13, 2011