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1.
A phrase or saying one will use when they see a "lurk" or a "creeper" nearby. Used as a warning to female friends to stay away from the creep.
"I don't like this area girl, we should initiate a lurk alert"

Girl: "Look at that creepy guy over there staring at the children by the playground...lurk alert!"
by TARABOP March 17, 2009