へそが茶を沸かす
へそがちゃをわかす
Also written 臍が茶を沸かす
Meanings
- Expression what a joke!; don't make me laugh! See also: へそで茶を沸かす (へそでちゃをわかす).
- Expression, Godan verb to split one's sides laughing; to be convulsed with laughter (literally: one's navel boils water (using the heat generated by laughing))