Idiom Definition:
Your browser does not support the audio element.
"to lay down the law"
to very strongly tell people what they must do, usually without regard for the opinion or feelings of other people
Synonyms:
appoint, authorize, command, compel, decree, demand, dictate, direct, exact, impose, inflict, insist, instruct, oblige, ordain, order, proclaim, require, rule, set, tell
Literally,
laying down the law. - - - - ->