To be in a bad mood; feeling irritable or displeased. Describes someone's mood or attitude.
朝から機嫌が悪くて、誰とも話したがらなかった。
He was in a bad mood from the morning and didn't want to talk to anyone.
上司の機嫌が悪い日は、余計なことを言わない方がいい。
On days when your boss is in a bad mood, it's better not to say anything unnecessary.
子どもが機嫌が悪いとすぐに泣き出すことがある。
When a child is in a bad mood, they may start crying quickly.