"Hey, did you see Jane's newest Facebrag? Eesh."
Often thinly disguised as a 'status update', the benchmark for a Facebrag is something that the offender would not normally say to friends, at work or otherwise in public for fear of being (correctly) branded as a complete nob.
Responding "FACEBRAG" on the offender's post in capitals can perhaps discourage others from repeating this heinous crime against humility.
UNCLE SILAS: FACEBRAG! Hope your plane crashes you miserable cretin.
JEZ HAMILTON: just won the lottery and is about to de-friend everyone poorer than him LOL!
UNCLE SILAS: You dirty little FACEBRAG. I'm going to find you and inject you with Aids.
Can also apply to all mediums of modern internet communication. (Examples: space-brag (MySpace), tweet-brag (Twitter), etc.
Why? I heard she's living "la vida loca".
Are you kidding me? She's a deli girl at Meier's. Her constant face-brag is unbelievably annoying!
Cool Guy: Wagwan?
Facebragger: Not much, just doing exams...only need a D...whatever? Even though I'm showing off you are totally cool!
Cool Guy: Whatever signs out to look cool