Kir is a cocktail made with a measure of crème de cassis (blackcurrant liquor) topped up with white wine.
In France it is usually drunk as an apéritif before a meal or snack. Originally the wine used was Bourgogne Aligoté, a lesser white wine of Burgundy. Many prefer a white chardonnay-based Burgundy, such as Chablis.
It is named after Félix Kir (1876 – 1968), mayor of Dijon in Burgundy. [source wikipedia]