bogey

also bo·gy or bo·gie (bōˈgē)

1. also (bo͝ogˈē, bo͞oˈgē) An evil or mischievous spirit; a hobgoblin.
2. also (bo͝ogˈē, bo͞oˈgē) A cause of annoyance or harassment.
3. Sports
   a. The number of strokes that a good player is likely to need to finish a golf hole or course.
   b. A golf score of one stroke over par.
4. Slang An unidentified flying aircraft.
5. Slang A detective or police officer.