Pull out all the stops
Meaning
Use every resource available to achieve something.
Usage
Used to describe lavish efforts.
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.
Organ stops control volume; pulling them all out creates maximum sound.
Used since the 19th century with musical roots.