Meaning: 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.
- Category: General
Idioms similar to 'Clean as a whistle'
- Blow the whistle
- Come clean
- Squeaky clean
- Clean sweep
- Clean break
- Clean slate
- Wipe the slate clean
- Clean bill of health
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