肌はだ脱ぬぐ

godan verb (-gu), intransitive verb

strip to the waist; bare one's upper body

Literally removing clothing from the upper body, often to work or fight. Can imply readiness for physical effort.

• 暑あついので、彼かれは肌はだ脱ぬいで庭にわ仕し事ごとをした。

  Because it was hot, he stripped to the waist and did the yard work.

godan verb (-gu), intransitive verb

pitch in; lend a hand; work hard

Figurative extension: to throw oneself into a task with great effort, as if stripping down for work. Often used in the set phrase 一肌脱ぐ (ひと肌脱ぐ).

See also: 片肌脱ぐ · 一肌脱ぐ

• 地ち域いきの祭まつりのために、みんなで一ひと肌はだ脱ぬごう。

  Let's all pitch in for the local festival.