澄すまし屋や

noun

prim person; prude; stuck-up person

Describes someone who acts overly proper, reserved, or self-consciously refined, often with a hint of disapproval.

• 彼かの女じょは澄すまし屋やで、いつも上じょう品ひんぶっている。

  She's a prim person, always putting on airs of refinement.

• あの澄すまし屋やには話はなしかけにくい。

  That stuck-up person is hard to talk to.