Egg rolls refer to a type of food item that is typically made with a thinly rolled-out piece of dough, which is then filled with various ingredients such as eggs, meat or vegetables, and finally cooked by rolling it up. The name comes from the fact that the finished product resembles an egg in shape when it's done. Egg rolls can be served as a snack, appetizer or main course dish depending on how they are prepared and what ingredients are used. They are popular all over the world and can vary greatly from region to region based on local flavors and customs.