いっぴんいっしょう

一顰一笑
a mood
a smile or a frown

* * *

いっぴんいっしょう【一顰一笑】

〔表情〕 a smile or a frown; 〔機嫌〕 one's mood [caprice].

●人の一顰一笑を窺う[に気をつかう] worry about people's reactions; let oneself be affected by the moods of others.