Monsieur-Madame

Monsieur (pronounced something like mer-ss- yer) is both used as a title, to mean Sir:
Bonjour Monsieur = Hello Sir
and as a noun, to mean man:
un vieux monsieur = an old man

The femine equivalent is madame.

In French cuisine, worth mentioning is the croque-monsieur, grilled sandwich with ham, cheese and béchamel sauce, and croque-madame, its variant topped with a fried egg. Recipes here