five-o

noun

The police.

First used 1980s
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Meanings

five-o1

nounfive-o (uncountable)

alternative 5-O · alternative five-oh · alternative 5.0 · alternative 5O · alternative Five-O

  1. uncountableUS street slangThe police.First known use 1980s

    Five-oh caught me, now I'm going to the mountains / Said good-bye to my girl, my lawyer and accountants

    1989, “Car Thief”, in Paul's Boutique, performed by Beastie Boys

Five-O2

nounFive-O (uncountable)
  1. uncountableAlternative letter-case form of five-o.

Synonyms & antonyms

Also see
ecilopesclopold billpolicepork'rales

Origin

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.

Full word history & related roots →
Cite this entry
APA

five-o. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/five-o

MLA

“five-o.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/five-o. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “five-o,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/five-o.

Source: five-o on Wiktionary, CC BY-SA 4.0.