The term ICE CREAM NUT refers to two types of nuts that are commonly used as toppings for ice cream. The first nut is PECAN, which is a type of tree nut native to North America and Mexico. It has a sweet, buttery flavor and is often used in desserts such as PECAN pie. The second nut is PISTACHIO, which is a type of nut native to the Middle East and Central Asia. It has a slightly salty flavor and is often used in desserts such as baklava. Both of these nuts are popular toppings for ice cream, adding a crunchy texture and a unique flavor to the dessert.