crap up

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crap up (third-person singular simple present craps up, present participle crapping up, simple past and past participle crapped up)

1. (transitive, slang, idiomatic, mildly vulgar) To ruin, botch, bungle; to make a mess of.
   • 1998, Charlotte Vale Allen, Meet Me in Time, page 177:

     This whole thing's his big, bright idea because they don't like having me around crapping up their big, romantic weekends.

2. (idiomatic, slang, mildly vulgar) To go wrong; to foul up; to make a mistake.

   I really crapped up on my fucking school work, so I had to do that frustrating piece of shit all over again.

• See also Thesaurus:make a mistake

• mess up
• fuck up
• screw up