Literally a ‘cup’ as in the World Cup (Coupe du Monde) but on a menu it usually means a sundae, a coupe glacée. These are properly served in a glass goblet, or coupe, but not always. There are a bazillion vesions, including les bananas splits and...
bouchées glacées au citron: lemon sorbet served in a frozen half a lemon
coupe c’hti (spéculoos, chicory, salty caramel and chantilly)
coupe périgordine (walnut ice cream, with eau de noix and chantilly)
Image by patrick janicek