whiter than white
过分正直或道德高尚
口语·形容道德完美无缺
英文释义
morally pure; completely innocent or blameless
例句
Politicians often claim to be whiter than white, but nobody believes them.
典故来源
源自白色象征纯洁的道德隐喻，强调极端清白或道德无瑕。