probably from the Arabic word كافر kafir (or kfr) meaning unbeliever, a term used by slave traders operating on the coasts of East Africa (Mozambique) to refer to Africans.
Definition
Berger cafre, sorcier cafre, langue cafre.
Les Bushmen réussissent des chefs-d'œuvre en plastique, leurs voisins cafres y sont médiocres.