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Region: UK / US | Usage example: The coach read the team the riot act after the third loss.

Read someone the riot act

Meaning

Scold someone severely to discourage bad behavior.

Usage

Used when issuing a stern warning.

Origin & History

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

England's 1714 Riot Act required crowds to disperse or face arrest.

Phrase appears in newspapers describing the actual act being read aloud.