Bottom sirloin is a cut of beef located at the rear of the cow, specifically from the sirloin section. It is known for its rich flavor and relatively tender texture, making it a popular choice for grilling and roasting. This cut is often less expensive than other sirloin cuts, such as the top sirloin, while still providing a satisfying taste. The bottom sirloin is typically divided into two main parts: the tri-tip and the flap meat. The tri-tip is particularly well-known for its triangular shape and is often used in barbecues, while flap meat is great for stir-frying or fajitas. Overall, bottom sirloin offers versatility in cooking methods and flavor.