河童かっぱの屁へ

expression, noun

something very easy; a cinch; a piece of cake

Idiomatic expression literally meaning 'a kappa's fart', used to describe a task that is trivially easy. Often used in the phrase 河童の屁とも思わない (to think nothing of).

See also: 河童

• こんな仕し事ごとは河童かっぱの屁へだよ。

  This kind of work is a piece of cake.

• 彼かれは難むずかしい試し験けんも河童かっぱの屁へとも思おもわないようだ。

  He seems to think nothing of even difficult exams.