noun: (UK dialectal) A bogey: a ghost, goblin, or other hostile supernatural creature, especially a small local spirit haunting gloomy places or the scenes of violence.
noun: (figuratively) A bugbear: any terrifying thing.
noun: (obsolete) Any real or imagined thing which prompts a horse to boggle (take fright).
noun: (obsolete) An outhouse: an outbuilding used as a lavatory.