mess-up

1.  Create disorder in; muddle or ruin. For example, On rainy days the children really mess up the house, or He had a way of messing up his own business. [c. 1900]
2.  Make a mistake, especially from nervousness or confusion, as in He messed up and took the wrong dossier to the meeting, or Jill swore she would never mess up again. [Colloquial; early 1900s]
3.  Beat up, manhandle, as in Joe got messed up in a barroom brawl. [Slang; early 1900s]

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v

Definition: disorder, dirty
Antonyms: arrange, order, organize, tidy

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IN BRIEF: n. - Something badly botched or muddled.

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The noun has one meaning:

Meaning #1: (British) something badly botched or muddled
  Synonyms: ballup, balls-up, cockup

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