The concept of `嘴硬` is deeply intertwined with the Chinese cultural value of 面子 (miànzi), or “face”—a complex mix of social standing, reputation, and pride. Admitting a mistake, especially publicly, can lead to a loss of face (丢面子, diū miànzi). Therefore, being `嘴硬` is often a defense mechanism to protect one's `面子`. Even if someone internally knows they are wrong, they might continue to argue stubbornly to maintain an outward appearance of being correct or in control. A Western comparison might be “being too proud to apologize” or “pig-headed,” but the motivation for `嘴硬` is more specifically rooted in social dynamics. While a Westerner might be stubborn out of individual pride, the Chinese context often involves how one is perceived by the group, family, or society. This makes `嘴硬` less about personal conviction and more about social performance. It's a temporary, verbal shield against embarrassment.
`嘴硬` is a very common, informal term used in everyday conversations among friends, family, and colleagues.