five-o

English

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.

Noun

five-o (uncountable)

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

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