What is Face-bomb?
1.
The act of systematically going through all of your facebook friends who are currently online and leaving (often short) wall posts for all or many of them. This is done with the hope of receiving a lot of wall posts in reply.
1. "Dude, I just spent the last half hour face-bombing my friends."
2. "All you do is face-bomb. It's so impersonal!"
See
