What does the term "On the Rocks" mean when ordering a drink?

The term "On the Rocks" refers specifically to a drink that is served over ice. When someone orders a beverage "on the rocks," it means they would like the drink poured over a glass of ice cubes, which helps chill the drink while also slightly diluting it as the ice melts. This method of serving is popular for various alcoholic beverages, such as whiskey, rum, or cocktails, as it enhances the drinking experience by adding a refreshing element and allowing the flavors to develop as the ice interacts with the liquid. Understanding this terminology is important for anyone in the hospitality or bar industry, as it helps provide accurate service to customers.