もろ肌はだを脱ぬぐ

expression, godan verb (-gu)

strip to the waist; bare one's upper body

Literal action of removing clothing from the upper body, often in preparation for physical work or a fight.

• 大だい工くさんはもろ肌はだを脱ぬいで仕し事ごとを始はじめた。

  The carpenter stripped to the waist and started working.

expression, godan verb (-gu)

go at with might and main; throw oneself into; get down to business

Idiomatic use: to tackle something with full energy and commitment, as if baring one's skin for a serious effort.

• 彼かれは難なん問もんにもろ肌はだを脱ぬいで取とり組くんだ。

  He threw himself into the difficult problem with all his might.