spook


spook (http://definr.com/spook)

     n 1: someone unpleasantly strange or eccentric [syn: creep, weirdo,
           weirdie, weirdy, schmuck]
     2: a mental representation of some haunting experience; "he
        looked like he had seen a ghost"; "it aroused specters
        from his past" [syn: ghost, shade, wraith, specter,
         spectre]
     v : frighten or scare, and often provoke into a violent action:
         "The noise spooked the horse"