In bartending, the term "neat" specifically refers to a spirit that is served straight from the bottle without any dilution or mixing, and without ice, simply at room temperature. This method of serving allows the drinker to experience the full flavor profile of the spirit without the interference of additional ingredients or temperature changes that ice or mixers might introduce. It is commonly used for spirits such as whiskey, rum, or vodka, and indicates a preference for the purity and character of the selected beverage.
The other options do not satisfy the definition of "neat." For example, serving a drink with ice would mean it is not neat, as ice acts as a form of dilution once it begins to melt. Likewise, a cocktail served with fruit involves the addition of mixers and other components, and a blended drink implies a processing method that changes the texture and consistency, which contradicts the straightforward nature of a neat pour.