muck up

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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

to ruin something. I should never have trusted Jim with the repair work. He was bound to muck it up. I asked her to take over for me while I was gone, and she really mucked it up. She mucked up the whole deal.
See also: muck, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

muck up

Bungle, damage, make a mess of, as in Don't let him write the review; he's sure to muck it up. This idiom alludes to the verb muck in the sense of "spread manure on." [Early 1900s] For a synonym, see foul up.
See also: muck, up
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

muck up

v. Slang
1. To make something dirty or contaminated, especially with mud, grime, or a similar substance: Don't step in that puddle; you'll muck up your shoes. The gears in the car's transmission were all mucked up.
2. To make some liquid unclear or unusable by stirring up elements settled on the bottom: Unfortunately, all the dredging in the river has mucked up the water so much that we can't go swimming. The rains mucked the water up, making it difficult for scuba divers to see.
3. To make something unusable by disrupting what should remain undisturbed: I tried to incorporate these ideas into my paper at the last minute, but all they did was to muck it up. The editor stopped the author from mucking up the book with needless revisions.
See also: muck, up
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. 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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