What is "bananas foster"

n. (context plurale tantum English) A dessert made of sliced bananas which are sautéed in rum, brown sugar, and banana liqueur. Served with ice cream and often flambéed at the table.

Bananas Foster is a dessert made from bananas and vanilla ice cream, with a sauce made from butter, brown sugar, cinnamon, dark rum, and banana liqueur. The butter, sugar and bananas are cooked, and then alcohol is added and ignited. The bananas and sauce are then served over the ice cream. Preparation of the dish is often made into a tableside performance as a flambé.