Oxford Dictionary English eat up phrasal verbphrasal verb Add to my wordlistjump to other resultsPhrasal Verbs eat up | eat somethingup Add to my wordlistjump to other results to eat all of something Eat up! We've got to go out soon. Come on. Eat up your potatoes.eat somebody up Add to my wordlistjump to other results[usually passive] to fill somebody with a particular emotion so that they cannot think of anything else She was eaten up by regrets.eat somethingup Add to my wordlistjump to other resultsto use something in large quantities Legal costs had eaten up all the savings she had. oxfordlearnersdictionaries.com