Muck Sth Mucked Meaning Badly Fail Achieve Goal

Meaning: If you muck something up, you do it badly and fail to achieve your goal.

• 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.