Skirt steak is a flavorful cut of beef that comes from the diaphragm area of the cow. It is known for its long, flat shape and is often used in dishes like fajitas and stir-fries. This cut has a rich, beefy taste and is best cooked quickly over high heat to maintain its tenderness. Due to its texture, skirt steak benefits from marinating before cooking, which can enhance its flavor and tenderness. It is typically served sliced against the grain to make it easier to chew. This cut is popular in many cuisines, especially in Mexican and Argentinian dishes.