Kentucky bourbon is an alcoholic beverage from Earth. It is a straight whiskey that has been distilled from a corn (maize) mixture. The drink originates from Bourbon County in the state of Kentucky, USA, on the North American continent.
By the 23rd and 24th centuries, Kentucky bourbon was still a favorite beverage of many humans, and was often stocked in bars across the Alpha Quadrant. (TOS novel: The Entropy Effect).