Facebook Flop 

A female on facebook who appears hot in the photo, but in real life is a dissapointment.

Bro # 1: "Dude look at this girl, she is gorgeous."
Bro # 2: "Nah Bro, she is a facebook flop. She is in my biology lab and she is gross."

Facebook Flop by Sticky Swine November 29, 2005

Facebook Birthday Flop 

The embarrassing situation where one's unpopularity is revealed by a disappointingly low number of public birthday wishes on one's Facebook wall, especially in comparison to others in one's peer group.

"Hey Steve, just looked at your wall and saw only three people wished you a happy birthday? WTF?!"

"I know man, so bummed. It was a total Facebook Birthday Flop :-(("

Facebook Birthday Flop by MP123 April 10, 2010