A person who spends an inordinate amount of time on thefacebook.com, consistently adding people they don't know as friends, joining groups, stalking people, etc.
Ken: "Sweet dogg! Caroline added me as a friend on the facebook today! That's basically 100% guaranteed ass-tappage! Giggidy giggidy
Mike: "I doubt it, man, that girl has 539 'friends' on there. Total facebook whore. Look, she even added 'Tony Danza' as a friend. I bet Tony hit that, right?"
Ken: "But, but, I, um..."
Mike: "Here, take the latest copy of 'Tig ol' Bitties,' go in the bathroom, and amuse yourself for a while."
Ken: "OK." (does just that)