Clean as a whistle

Meaning

Spotless, orderly, or innocent.

Usage

Used when praising tidiness or innocence.

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.

Whistle's clear tone symbolizing purity.

Used since the 18th century in British English.