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rude slang To jumble up or ruin something. A noun can be used before or after "up." Boy, you really bitched up this report—I'm not sure I can even fix it.
bitch someone or something up
Inf. to mess someone or something up. (Use discretion with bitch, a word many consider coarse or vulgar.) Who bitched these cards up? I never bitch up anything!
bitch something up
tv. to mess something up; to ruin or spoil something. (Usually objectionable.) The rain so bitched up our picnic!