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To have a sook (to bitch, complain, etc.), on Facebook, by posting it as your status. Most often done by fat emo girls, usually every half hour.
Emo girl: Wtf my life sux soooo bad gaiz ahh.
Person: Get off Sookbook and tell someone who cares. And lose some weight.
by Xeno The Cowardly Prince January 03, 2011