鬼き面めん人ひとを驚おどろかす

expression, godan verb (-su)

to bluff; to make empty threats; to intimidate by appearance

Idiomatic expression meaning to try to scare someone with a fierce look or empty threats, like a demon mask. Often used when someone's bark is worse than their bite.

• 彼かれは鬼き面めん人ひとを驚おどろかすようなことを言いうが、本ほん当とうは優やさしい。

  He says things that are like empty threats, but he's actually kind.

• そんなに怒ど鳴なっても、鬼き面めん人ひとを驚おどろかすだけだよ。

  Even if you yell like that, it's just bluffing.