Definition of mess up in English:

mess up

informal Mishandle a situation: he singled out the health care fiasco as an example of how the government has messed up
More example sentences
  • It's an extremely messed up situation when one innocent man has to die to protect others.
  • It messes up your health, screws up your lungs and eats you away inside.
  • It just messes up an already messed up situation.
informal mess up, botch, make a hash of, foul up
See parent entry: mess

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reject (someone or something) in an abrupt manner…