1.
moody person; someone whose behavior changes with their mood
A person whose attitude, cooperativeness, or temperament fluctuates noticeably depending on their mood at any given time.
あの人は機嫌屋だから気をつけて。
That person is moody, so be careful.
上司が機嫌屋だと、職場の雰囲気が日によって変わる。
When the boss is moody, the workplace atmosphere changes from day to day.
機嫌屋の友人とは付き合い方を工夫しないと、疲れてしまう。
If you don't adjust how you deal with a moody friend, it'll wear you out.
Composed of 機嫌 (mood; humor) + 屋 (person characterized by a trait). The suffix 屋 here marks someone defined by the quality — similar to 怒りん坊 (hothead) or 寂しがり屋 (lonely person). Carries a mildly negative nuance, implying the person is difficult or unpredictable to deal with.
COMMON COLLOCATIONS:
- 機嫌屋の上司: a moody boss
- 機嫌屋だから困る: it's a problem because they're moody
SIMILAR WORDS:
- 気分屋: a moody or whimsical person — very close synonym, slightly more common
- 気まぐれ: capricious; whimsical — emphasizes unpredictability of decisions and preferences
- 短気: short-tempered — specifically about getting angry quickly, not general moodiness