- the tenderest part of a loin of beef, pork, etc., located on either side of the backbone and consisting of the psoas muscle
- any urban district similar to the Tenderloin
former district in New York City, in which there was much graft and corruption: so called because regarded as a choice assignment for police seeking graft
- The tenderest part of a loin of beef, pork, or similar cut of meat.
- A city district notorious for vice and graft.
Origin of tenderloinSense 2, after the Tenderloin, an area of New York City (from the easy income it once afforded corrupt policemen).