five-o

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English[edit]

Etymology[edit]

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.

Noun[edit]

five-o ‎(uncountable)

  1. (US, slang, street slang) The police.

Usage notes[edit]

  • Typically shouted as a warning of approaching police by lookouts at a site of drug-dealing etc.