気き分ぶん屋や

noun

moody person; someone whose mood changes easily

Describes a person whose feelings or attitude shift frequently, often used in a slightly critical or teasing way.

• 彼かれは気き分ぶん屋やだから、急きゅうに機き嫌げんが悪わるくなることがある。

  He's a moody person, so he sometimes suddenly gets into a bad mood.

• 気き分ぶん屋やの上じょう司しに振ふり回まわされて大たい変へんだ。

  It's tough being at the mercy of a moody boss.