bad mood; displeasure; sullenness
Describes a visibly unhappy, sulky, or irritable state. Often used with ～な, ～になる, or ～そう. The antonym is 上機嫌 (good mood).
See also: 上機嫌
He has been in a bad mood since morning.
不機嫌な顔をしないでください。
Please don't make such a sullen face.
He became sullen after being kept waiting.
She stayed silent with a sulky look on her face.
He answered in a sullen tone.
That one remark put him in a bad mood.