抜ぬけ作さく

noun

fool; dimwit; blockhead

Colloquial and derogatory term for a stupid, careless, or absent-minded person. Often used teasingly or in mild insults.

• あいつは本ほん当とうに抜ぬけ作さくだな。

  That guy is a real dimwit.

• そんな簡かん単たんなミスをするなんて、抜ぬけ作さくにもほどがある。

  Making such a simple mistake, you're beyond a blockhead.