femme fatale
From Longman Dictionary of Contemporary Englishfemme fatalefemme fa‧tale /ˌfæm fəˈtɑːl $ ˌfem-/ noun (plural femmes fatales) [countable] WOMANa beautiful woman who men find very attractive, even though she may make them unhappyExamples from the Corpusfemme fatale• She is potent and dangerous enough to be a femme fatale and she makes life hell for William.• Also at the party is Cara, a femme fatale and consummate games player.• Antonio plays a character whose life is thrown into chaos by Angelina's femme fatale.• Enter the voluptuous femme fatale with dangerous links to the mob.Origin femme fatale (1900-2000) French “woman who can kill”