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Region: General | Usage example: After the cleanup, the lab was clean as a whistle.

Clean as a whistle

Meaning

Spotless, orderly, or innocent.

Usage

Used when praising tidiness or innocence.

Origin & History

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

Whistle's clear tone symbolizing purity.

Used since the 18th century in British English.

Related Idioms

Come clean

Confess honestly.

Clean slate

Start over without being judged for past mistakes.

Clean break

Cut ties quickly and decisively.

More Idioms

Break the ice

To do or say something to relieve tension or get conversation going in a social situation.

Cut to the chase

Skip ahead to the most important or exciting part of something.

The ball is in your court

It is now your turn to take action or make a decision.

Throw in the towel

To concede defeat or admit a struggle isn't worth continuing.