Meaning: If you muck something up, you do it badly and fail to achieve your goal.Synonym: mess up, screw up (informal)
- muck up sth I went to a new barber today and he mucked up my hair style. It looks terrible.
- muck sth up Sally went to a job interview today, and she thinks she mucked it up. She said she was really nervous and she couldn't think clearly.
If you muck something up at work, your boss will probably
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Contributor: Matt Errey