Throw the book at
Meaning
Punish severely by applying all available rules.
Usage
Describes harsh legal or regulatory action.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Refers to using the full text of the law.
American legal reporting in the early 1900s used the phrase.