noun, noun which may take the genitive case particle 'no'
depending on one's mood; as one feels like
Used when a decision or action is based on how one feels at the moment, often implying a lack of fixed plan or principle.
今日の予定は気分次第で決めよう。
Let's decide today's plans depending on how we feel.
彼のやる気は気分次第だ。
His motivation depends on his mood.
Compound of 気分 (mood, feeling) and 次第 (depending on).