A kir is a most refreshing aperitif consisting of dry white wine and a soupçon (sexy French term for "very small amount") of crème de cassis, a sweet black currant-flavored liqueur. To make kir royale (a far more popular version in the United States), substitute the wine with Champagne. The drink is named after onetime Canon Félix Kir (1876-1968), mayor of Dijon, France.