whistle /ˈwɪsl/► SEE ALLyou, etc. can whistle for itwhistle in the darkblow the whistle (on sb/sth)(as) clean as a whistlewet your whistle ●you, etc. can ˈwhistle for it (BrE, spoken) used to say that you are not going to give sb sth that they have asked for（表示不打算给某人所要的东西）休想得到◆‘The boss wants that sales report this afternoon.’ ‘Well, he can whistle for it.’ “老板想今天下午看到销售报告。”“哦，让他别指望了。”●whistle in the ˈdarktry not to show that you are afraid, are in danger, etc.借吹口哨壮胆；故作镇静◆He seems confident we’ll get the money we need, but I think he’s just whistling in the dark. 对于我们会筹到所需钱款的事，他看上去信心十足，但我觉得他不过是故作镇静罢了。●blow the ˈwhistle (on sb/sth) (informal) stop sb doing sth illegal or wrong by telling a person in authority about it检举，揭发（某人／某事）（使某人停止干违法的事或错事）◆One of the police officers blew the whistle on his colleagues when he found out they were taking bribes.一名警察发现自己的同事受贿后检举了他们。▸ˈwhistle-blower
noun
a person who informs people in authority or the public that the company they work for is doing sth wrong or illegal检举揭发舞弊内情的人；举报人◆The company has denied a whistle-blower’s allegations of poor security.这家公司否认了一名检举者有关安全防范薄弱的指控。NOTE This idiom probably comes from football, where a referee blows a whistle to stop the game when a player breaks the rules.这个习语或许源于足球。球员犯规时裁判就吹哨中止比赛。●(as) clean as a ˈwhistle (informal) 1. ( (as) clean as a new ˈpin) very clean干干净净◆She scrubbed the kitchen floor until it was clean as a whistle.她把厨房的地板擦得干干净净。2.if sb is as clean as a whistle, they are not involved in anything illegal清白无罪◆I don’t know why the police want to talk to me. I’m as clean as a whistle!我不知道为什么警方找我谈话，我可是清清白白的！●wet your ˈwhistle (old-fashioned, informal) have an alcoholic drink喝酒