和英辞書

臍を噛む

verb

(literally) To bite one's own navel / (idiomatic) To be deeply regretful about something

彼は失敗した後で自分自身を責め、臍を噛んでいた。

After failing, he blamed himself and was biting his own navel (figuratively expressing deep regret).

意味（1）

(literally) To bite one's own navel

意味（2）

(idiomatic) To be deeply regretful about something

とんかつを食(た)べるべきだったのにカレーを選(えら)んでしまったことに臍(ほぞ)を噛(か)んでいるんだ。

Tonkatsu o ta beru bekidatta no ni karē o erande shimatta koto ni hozo o kande irunda.I'm really regretting my decision because I chose curry when I should have had pork cutlets.