clean as a whistle

idiom

Definition of clean as a whistle

informal
: very clean We scrubbed the old boat until it was (as) clean as a whistle.
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Cite this Entry

“Clean as a whistle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/clean%20as%20a%20whistle. Accessed 17 Aug. 2022.

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