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1.
n. One who annoyingly posts a Facebook status multiple times an hour, often resembling a tweet.
John: Dammit! I'm sick of getting updates every time Jessica dillyfucks around!

Billy: She's such a Facetwat
by Foohtube October 04, 2010
 
2.
n., 1. An individual who compulsively and serially posts photographs of themselves on Facebook in an effort to gain self-gratifying attention. 2. A photographic self-portrait usually taken at arms length. Such photographs are characterised by a resultant looming, horse/spoon-faced image of the subject. 3. A rampant self-publicist.
They're such an annoying Facetwat. They keep posting spoonface pictures of themselves on Facebook just to get attention.
by GreyFlames March 15, 2011