not have a leg to stand on
无法提供合理且有力的证据或理由支持自己的观点、主张或决定
口语·表达缺乏依据
英文释义
to have no evidence or argument to support one's position; to be unable to prove or justify something
例句
Without evidence, you don't have a leg to stand on in court.
典故来源
源自16世纪法律术语，比喻论点像无腿的人站不稳。