English version

bite off more than you can chew

From Longman Dictionary of Contemporary Englishbite off more than you can chewbite off more than you can chewMORE THAN something OR somebody ELSEto try to do more than you are able to do bite
Examples from the Corpus
bite off more than you can chewMany kids who leave home to live alone find they have bitten off more than they can chew.
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