Someone who spends all their time looking at people they don't know, usually someone they are infatuated with or loath. Looking through all their pictures, wall posts, friends and everything else. These people generally have no life and/ or no friends and are too afraid to talk to the person they are creeping on. The facebook creep's main tool is the search bar with which they use to find their target. Every time the facebook creep signs on they usually check their online friends to see if their target person is online. If they are they will look at their profile, if not they may wait a couple minutes before typing the targets name into the search bar, and then look at their profile.
Morgan and Maria go online during class to facebook creep.