noun, used as a suffix
looking like a ...; acting as if a ...
A suffix attached to nouns or adjective stems to describe someone's facial expression or demeanor, often with a negative or mocking tone. Common in casual speech.
彼はいつも不機嫌面をしている。
He always has a grumpy look on his face.
あの子、知ったかぶり面で話すから嫌いだ。
I don't like that kid because he talks with a know-it-all expression.
顔 is the standard word for 'face' and is neutral. 面 (づら) is a suffix that specifically describes a facial expression or attitude, often with a negative nuance.
Derived from the noun 面 (つら, 'face'), which has a more vulgar or rough connotation compared to 顔. The suffix form づら is a voiced variant used in compounds.