しぶ かおをする
shibui kaō suru

Suru Verb
Expression

1. to frown (on); to be grim-faced; to look sullen

うちの課長 かちょう わたくし なんかを たのむといつも しぶ かおをするんだ。
uchino kachōwa watashiga nanikao tanomuto itsumo shibui kaō suru nda
Our section chief always makes a face at me when I ask him for something.