名词whistle的一个主要意思就是警哨、警笛,动词短语blow the whistle(吹哨子)沿袭下来的意义就表示“告密,揭发,检举(不正当行为)”,是个俚语。由此形成的一个名词“告发”就是whistleblowing,“告密者”就是whistleblower。
例句:
Someone has blown the whistle on his doctoring the accounts.
有人告发他伪造帐目。
It's said that those government officials who had blown the whistle also got transferred.
据说检举这个事的政府官员也被调职了。