muck something up

muck up

To ruin or mess something up. A noun or pronoun can be used between "muck" and "up." Boy, you really mucked up this report, and I don't have time to fix it right now.
See also: muck, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

muck something up

tv. to mess something up; to ruin something. Try not to muck it up this time.
See also: muck, something, up
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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