femme fatale
Concise Oxford English Dictionary © 2008 Oxford University Press:
femme fatale /ˌfam fəˈtɑːl/
▶noun (pl. femmes fatales pronunc. same) an attractive and seductive woman.
– origin early 20th cent.: Fr., lit. ‘disastrous woman’.
'femme fatale' also found in these Oxford entries:

