What does 'Clean as a whistle' mean?

If something is as clean as a whistle, it is extremely clean, spotless. It can also be used to mean 'completely', though this meaning is less common nowadays. If somebody is clean as a whistle, they are not involved in anything illegal.

Idioms similar to 'Clean as a whistle'


All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.

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