mahoun

from The Century Dictionary.

• noun Mahomet or Mohammed: an old form of the name of the Arabian prophet.
• noun [lowercase] A monster; a terrifying creature.
• noun The devil; an evil spirit: so called as confused or identified, in the medieval mind, which regarded all heretics and false prophets as instigated by the devil, with Mahomet or Mohammed, the False Prophet. Compare maumet.
• noun [lowercase] An idol or pagan deity. See maumet.