five-o

== English == === Alternative forms === 5-O, five-oh, 5.0, 5O, Five-O === Etymology === From the police procedural television series Hawaii Five-O (first aired in 1968), so named because it is set in Hawaii, which is the 50th U.S. state. === Pronunciation === === Noun === five-o (uncountable) (US street slang) The police. [from 1980s] === Further reading === “five-oh n.”, in Green’s Dictionary of Slang, Jonathon Green, 2016–present Eric Partridge (2005), “five-oh”, in Tom Dalzell and Terry Victor, editors, The New Partridge Dictionary of Slang and Unconventional English, volume 1 (A–I), London; New York, N.Y.: Routledge, →ISBN, page 754.