へそでちゃをわかす

へそで茶を沸かす

表記・読み：臍で茶を沸かす・へそで茶をわかす・臍で茶をわかす・へそでちゃをわかす

1. 1

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

   expressions (phrases, clauses, etc.)idiomatic expression
2. 2

   to split one's sides laughing; to be convulsed with laughter; to boil tea with one's navel (using the heat generated by laughing)

   expressions (phrases, clauses, etc.)五段動詞（す）idiomatic expression