嘴巴硬

嘴巴硬:

Literally means:

mouth hard

Actually means:

stubborn and reluctant to admit mistakes or defeats

It means one is so stubborn that he is reluctant to admit his weaknesses, mistakes, or defeats.

It also means that one speaks in an unyielding manner, but he is actually weak inside. Derogatory.

明明知道自己有缺点，有错误或不如人家，却还要在口头上强辩，一点也不肯承认。

也指虽然说话强硬，内心并不强硬。含贬义。