大おおぼらを吹ふく

expression, godan verb (-ku)

talk big; boast; tell tall tales

Idiomatic expression for exaggerated boasting or telling unbelievable stories, often with a humorous or critical tone.

• 彼かれはいつも大おおぼらを吹ふいてばかりいる。

  He's always talking big.

• そんな大おおぼらを吹ふいても誰だれも信しんじないよ。

  Nobody will believe you if you tell such tall tales.