(1) Commonly used by Los Angeles radio and television media to refer to their broadcast market which includes Los Angeles and Orange Counties and portions of Riverside, San Bernardino and Ventura Counties.
(2) A put-down on Los Angeles popularly used after World War II through the 1960s.
(3) Spanish for "The Town." This was one of the early abbreviated names of the city during the Spanish period (1781-1832).
Source: Labels for Locals by Paul Dickson, 1997, Merriam Webster and Almanac Research