Definition of maîtresse femme in English:
 maîtresse femme
(also maitresse femme)
noun meɪˌtrɛs ˈfammɛˌtrɛs ˈfam
A strong-willed or domineering woman.
Origin
Mid 19th century; earliest use found in Charlotte Brontë (1816–1855), novelist. From French maîtresse femme from maîtresse + femme woman.