not have a leg to stand on 站不住脚；理屈词穷

【例句】
My lawyer said I didn't have a leg to stand on, so I shouldn't sue the company.
我的律师说我的证据站不住脚，所以我不应该起诉这家公司。

Oh, in that case, he doesn't have a leg to stand on!
哦，在那种情况下，司机说的话就站不住脚了。