Flank steak is a lean, flavorful cut of beef taken from the lower abdomen of the cow. It is known for its distinctive grain and slightly chewy texture, which makes it ideal for marinating and quick cooking methods such as grilling, broiling, or stir-frying. When sliced against the grain, flank steak becomes tender and juicy, making it a popular choice for dishes like fajitas, steak salads, and sandwiches.