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)
- (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.