One of a variety of types of flavored brandy, Ginger brandy is usually 100 proof. Ginger brandy can be mixed with various fruit juices (pineapple, grapefruit, etc.), and it is also used in cooking. Some also swear by Ginger brandy as a cold remedy, taking it at the first signs of sore throat or cough.
See the Everything Bartender for some drinks with Ginger brandy, such as the Gingersnap.