The strip steak is a cut of beef steaks from the short loin from a cow. It consists of a muscle that does little work, the longissimus, making the meat particularly tender; although not as tender as the nearby psoas major or tenderloin. Fat content of the strip is somewhere between the two cuts. Unlike the tenderloin, the longissimus is a sizable muscle, allowing it to be cut into larger portions.
According to the National Cattlemen's Beef Association, the steak is marketed in the United States under various names, including Ambassador Steak, Boneless Club Steak, Hotel-Style Steak, Kansas City Steak, New York Steak, Top Loin, and Veiny Steak.
In the UK and Ireland it is called sirloin.
In Canada, most meat purveyors refer to this cut as a strip loin; in French it is known as contre-filet.
Delmonico's Restaurant, an operation opened in New York City in 1827, offered as one of its signature dishes a cut from the short loin called a Delmonico steak. Due to its association with the city, it is often referred to as a New York strip steak.