look up any word, like sex:
 
1.
To use Facebook as a platform to brag. Normally about a job, internship, trip, purchase or anything else that nobody really needs to know but you'd like to tell everyone because you're awesome.
Sample Facebook Status: Jane Stephens is headed to London with her new iPhone for her 2nd JOB INTERVIEW!!!!! :))))

"Hey, did you see Jane's newest Facebrag? Eesh."
by Rtrock June 29, 2009
 
2.
A statement of boast, self-promotion or any other kind of self-glorification posted on the social networking site Facebook.

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.
GEORGE WILSON: is about to board the plane to the Maldives for three weeks of diving and surfing with his hot Page 3 girlfriend! So long suckers!

UNCLE SILAS: FACEBRAG! Hope your plane crashes you miserable cretin.

or:

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.
by Duchy69 August 20, 2010
 
3.
The act of knowingly and consistently using your Facebook wall to list all your supposed accomplishments and embellish your fabulosity quotient.

Can also apply to all mediums of modern internet communication. (Examples: space-brag (MySpace), tweet-brag (Twitter), etc.
Sadly, I had to delete Marsha from my list of friends on Facebook.

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!
by rankled July 17, 2009
 
4.
To stroke one's own ego to orgiastic extreme via undaunted exhibitionism, the primary activity of a facetard
If you had a life you wouldn't see fit to facebrag anything let alone be a facetard
by OsirusT May 26, 2013
 
5.
To totally use facebook to show off to a really embarrasing extent...
On Facebook chat:

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
by Cool Guy765667 July 10, 2009