Term describing a person who is of hybrid race, usually a cross between a European and an African negro. The term comes from the French "coffee with milk" to describe the color. Unlike most terms used to describe these people, it is not usually meant in a derogatory way.
Dude 1: Beyonce is a fine cafe au lait chick
Dude 2: Come off it man, that negress wears a fucking wig!