Top definition
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 :-(("
by MP123 April 10, 2010
Get the mug
Get a Facebook Birthday Flop mug for your dog Manley.