(as) clean as a whistle
US /əz ˈkliːn əz ə ˈhwɪsl/
UK /əz ˈkliːn əz ə ˈhwɪsl/

1.
ピカピカ, 完全にきれい
completely clean or spotless
:
•
After she scrubbed the kitchen, it was as clean as a whistle.
彼女がキッチンを磨いた後、そこはピカピカだった。
•
The car came back from the car wash as clean as a whistle.
洗車から戻ってきた車はピカピカだった。
2.
何の問題もなく, スムーズに
without any problems or difficulties; smoothly
:
•
The whole operation went as clean as a whistle.
作戦全体は何の問題もなく進んだ。
•
He got through the interview as clean as a whistle, answering every question perfectly.
彼はすべての質問に完璧に答え、面接を何の問題もなく乗り切った。
3.
全く問題ない, 潔白な, 合法的な
without any illegal or immoral actions; legally and honestly
:
•
The politician's record was found to be as clean as a whistle after the investigation.
調査の結果、その政治家の経歴は全く問題ないことが判明した。
•
He swore his business dealings were as clean as a whistle.
彼は自分の商取引が全く不正のないものだと誓った。