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

1.
tragarse las palabras, retractarse
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.
Dijo que no podía hacerlo, pero le haré tragarse sus palabras.
•
After the team won, the critics had to eat their words.
Después de que el equipo ganó, los críticos tuvieron que tragarse sus palabras.