雪隠大工せっちんだいく

noun

lousy carpenter; incompetent carpenter

Derogatory term for a carpenter who does poor work. The word 雪隠 (せっちん) originally means 'toilet', implying the carpenter's work is fit only for a toilet. Rare and old-fashioned; not commonly used in modern Japanese.

• あの大だい工くは雪せっ隠ちん大だい工くだと言いわれている。

  That carpenter is said to be a lousy carpenter.