気分(きぶん)屋(や)

きぶんや
noun, na-adjective
moody person; someone whose mood changes easily
personality
1. moody person; someone whose mood changes easily
a person whose feelings and attitudes fluctuate frequently and unpredictably
彼(かれ)は気分屋(きぶんや)だから扱(あつか)いにくい。
He's moody, so he's hard to deal with.
I'm having trouble because my boss is moody.
気分屋(きぶんや)な性格(せいかく)を直(なお)したいと思(おも)っている。
I want to fix my moody personality.

Etymology

気分(きぶん) (mood) + 屋(や) (person suffix indicating a tendency)

Usage

Often has a slightly negative connotation, implying that the person is difficult to deal with because their behavior depends on their mood. Can be used self-deprecatingly.

RELATED WORDS (~屋(や), a person with a tendency):

Common patterns