●(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！