What does the term "on the rocks" mean?

The term "on the rocks" refers specifically to a drink that is served over ice. This method of serving is popular because the ice chills the beverage while also slightly diluting it as the ice melts, which can enhance the flavors of the drink. When bartenders prepare a drink "on the rocks," they typically fill a glass with ice and then pour the spirit or cocktail directly over it.

This is distinct from the other terms associated with drink preparation. For example, "served neat" refers to a drink that is served at room temperature, without any ice. "Served with soda" indicates a drink that has soda mixed in, and "served warm" would mean the drink is heated, which is not typical for most cocktails or spirits. Therefore, "on the rocks" specifically conveys the action of serving a drink over ice, making it the correct choice.