■ noun
1》 the tenderest part of a loin of beef, pork, etc., taken from under the short ribs in the hindquarters.
↘ US the undercut of a sirloin.
2》 N. Amer. informal a district of a city where vice and corruption are prominent. [C19: orig. a term applied to a district of New York, seen as a ‘choice’ assignment by police because of the bribes offered to them to turn a blind eye.]