Here's an interesting new word I just learned from the Kitchn:
"La Grigne: In baking terms, this refers to the little lip of crust that pulls away from the body of the baking loaf right along the score-marks slashed in the surface. In french, this literally means 'the grin.' "
Since they are such a bread-loving country, it makes sense that the French would have a word for that. And "the grin" is usually very tasty too.