The term 'crab legs' is a type of SEAFOOD that is popular in many cultures. It is made from the legs of crabs and can be cooked in a variety of ways. The most common way to prepare crab legs is to boil or steam them, which helps to bring out their flavor. They are often served with melted butter or other sauces, and can be eaten as an appetizer or main course. Crab legs are a great source of protein and are low in fat and calories.