blow the whistle on

(informal)bring an illicit activity to an end by informing on the person responsible

(非正式)終止不合法活動；告發，揭發

(as) clean as a whistle

extremely clean or clear

潔凈；清清楚楚

whistle something down the wind

let something go; abandon something

放走，聽其自由；放棄

whistle in the wind

try unsuccessfully to influence something that cannot be changed

徒然無功

blow the whistle&I{【俚語】}

To expose a wrongdoing in the hope of bringing it to a halt

揭發：懷著使違法行為得以中止的希望而告發

an attorney who blew the whistle on governmental corruption.

一個揭發政府腐敗的律師

whistle in the dark

To attempt to keep one's courage up.

給自己壯膽：試圖鼓起某人的勇氣