平へい気きの平へい左ざ

expression, noun which may take the genitive case particle 'no'

completely unconcerned; nonchalant; cool as a cucumber

Emphatic set phrase describing someone who remains utterly calm and unbothered, even in situations where others would worry. Often used with a nuance of mild criticism or admiration for someone's thick skin.

• 彼かれは失しっ敗ぱいしても平へい気きの平へい左ざだ。

  He's completely unfazed even when he fails.

• あの子こは叱しかられても平へい気きの平へい左ざで、また同おなじことをする。

  That kid is totally unbothered even when scolded, and does the same thing again.