JMdict: 2761770

へそで茶をわかす 【へそでちゃをわかす】

  1. [exp] what a joke!; don't make me laugh!
  2. [exp,v5s] to split one's sides laughing; to be convulsed with laughter; to boil tea with one's navel (using the heat generated by laughing)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
Tea チャ, サ 2