Meanings
From read the Riot Act. See sense 2. The Riot Act is a historical British Act of Parliament enacted in 1714, which stated that once a statutory warning was read out to rioters and they failed to disperse within one hour, then authorities may use any force to disperse them with impunity.
How to pronounce "read someone the riot act":
AU
To scold or berate somebody; to reprimand.
To give a formal warning for a riotous assembly to disperse, usually through reading a section of the Riot Act.
