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When one goes on a "deleting spree" on Facebook, deleting any/all friends they may have added but have never spoken to.
Dude, I just did a Facebook Detox.. I deleted 400 friends from high school that I didn't even know
by yodogcool January 10, 2011

i.e. Someone who pretends that they have better things to do than be on facebook.

Please see Betty Cox.
Katherine could never undergo facebook detox, even though she actaully is a loser.
by Bisky Burns March 21, 2007