1muck something up, muck up somethingDo something badly or ineptly; mishandle something.
make a mess of, mess up, botch, bungle, spoil, ruin, wreck, mishandle, mismanage
- ‘she had mucked up her first few weeks at college’
2Australian, New Zealand Behave badly; mess around.
- ‘boys are more likely to muck up at what they see as poor teaching’
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