Source : Webster's Revised Unabridged Dictionary (1913)

Jezebel \Jez"e*bel\, n. [From Jezebel, Heb. Izebel, the wife of
   Ahab king of Israel.]
   A bold, vicious woman; a termagant. --Spectator.

Source : WordNet®

Jezebel
     n 1: wife of Ahab who was king of Israel; according to the Old
          Testament she was a cruel immoral queen who fostered the
          worship of Baal and tried to kill Elijah and other
          prophets of Israel (9th century BC)
     2: a shameless impudent scheming woman