take the fifth
拒绝回答问题或给予任何信息，通常是因为害怕自己可能会被指控违法或引起麻烦。
法律或日常·拒绝回答敏感问题
英文释义
to refuse to answer a question, especially in a legal proceeding, in order to avoid self-incrimination
例句
When asked about his whereabouts, he decided to take the fifth.
典故来源
源自美国宪法第五修正案，赋予公民在法庭上拒绝自证其罪的权利。