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.

Literally everyone, ever. Including the writer of this definition.

n. One who annoyingly posts a Facebook status multiple times an hour, often resembling a tweet.