eat one´s words

take back what one has previously said was true, certain

 “It seems a little doubtful whether snooker as a spectator game is sufficiently popular to warrant the successful promotion of such an event,” responded the miffed secretary of the Billiards Association and Control Council … but it is not recorded whether he finally ate his words. WebC

This year he ate his words when his company re-entered the hosted market.  WebC

At 6.13pm on Wednesday, he ate his words, with a brief resignation speech.  WebC

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