eat your words
US /iːt jʊər wɜrdz/
UK /iːt jʊər wɜrdz/

1.
自分の言葉を撤回する, 発言を撤回する
to admit that something you said earlier was wrong, especially when you were boasting or very confident
:
•
He said I couldn't do it, but I'll make him eat his words.
彼は私ができないと言ったが、私は彼に自分の言葉を撤回させるだろう。
•
After the team won, the critics had to eat their words.
チームが勝った後、批評家たちは自分の言葉を撤回するしかなかった。