へそで茶ちゃを沸わかす

expression

what a joke!; don't make me laugh!

Used as an exclamation to dismiss something as ridiculous or laughable. Often said in response to an absurd statement or situation.

• 彼かれが社しゃ長ちょうになる？へそで茶ちゃを沸わかすよ。

  Him becoming president? Don't make me laugh.

expression, godan verb (-su)

to split one's sides laughing; to be convulsed with laughter

Describes laughing so hard that one's belly shakes, as if the heat from laughing could boil tea in the navel. The literal image is often explained but not used in everyday description.

• あの漫まん才ざいを聞きいて、へそで茶ちゃを沸わかすほど笑わらった。

  I laughed so hard at that comedy duo that I nearly split my sides.