Hollywood
Shorthand for the American film industry — its money, glamour, and clichés.
Origin
A Los Angeles neighborhood that became the geographic center of American filmmaking in the 1910s, when studios moved west to escape Edison's East Coast patent trust and to take advantage of the climate. By the 1920s 'Hollywood' meant the industry, not the place. 'A Hollywood ending' = a tidy, satisfying conclusion that real life rarely supplies.
Modern usage
Standard metonymy. 'Hollywood treatment', 'Hollywood smile', 'Hollywood ending' — all signal slick, manufactured, mass-market appeal.
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