as in to fumble
to make or do (something) in a clumsy or unskillful way
I swear, she mucks up everything she tries
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of muck up
Lawmakers need to get back to Washington to end the government shutdown - a shutdown that has mucked up travel plans around the country by contributing to widespread flight delays.
—
Zachary Schermele, USA Today, 11 Nov. 2025
While the Governor's Cup may be safe, there are other ways the ACC's and SEC's scheduling moves could muck up Louisville's future football schedules.
—Payton Titus, Louisville Courier Journal, 25 Sep. 2025
What's mucking up the process is a telepathic outlier named The Mule (Pilou Asbæk), whose ravenous appetite for galactic dominance has created anomalies in Seldon's branching prognostications of how this whole ordeal will unfold.
—Jeff Spry, Space.com, 29 Aug. 2025
The hydrogen flow keeps vaporized tin from mucking up the system’s optics.
—IEEE Spectrum, 12 June 2023
See All Example Sentences for muck up
Zachary Schermele, USA Today, 11 Nov. 2025
While the Governor's Cup may be safe, there are other ways the ACC's and SEC's scheduling moves could muck up Louisville's future football schedules.
—Payton Titus, Louisville Courier Journal, 25 Sep. 2025
What's mucking up the process is a telepathic outlier named The Mule (Pilou Asbæk), whose ravenous appetite for galactic dominance has created anomalies in Seldon's branching prognostications of how this whole ordeal will unfold.
—Jeff Spry, Space.com, 29 Aug. 2025
The hydrogen flow keeps vaporized tin from mucking up the system’s optics.
—IEEE Spectrum, 12 June 2023
See All Example Sentences for muck up
Recent Examples of Synonyms for muck up
Verb
-
In a stunning blowout Friday night, KU fumbled its conference tournament semifinal against the Houston Cougars, losing 69-47.—
Kansas City Star,
Kansas City Star,
14 Mar. 2026
-
This alone can shave valuable minutes off your screening and help you to breeze through the scanner instead of fumbling at the bins.—
Kayla Kitts,
Travel + Leisure,
13 Mar. 2026
Verb
-
Victor Wembanyama had 21 points and 13 rebounds, and the San Antonio Spurs overcame an early 14-point deficit before blowing most of a 24-point lead and recovering to hold off the Los Angeles Clippers 119-115 on Monday night.—
CBS News,
CBS News,
17 Mar. 2026
-
When Italian thieves blew apart Knightsbridge, Prager could have fled.—
Jack Crosbie,
Rolling Stone,
17 Mar. 2026
Verb
-
The Sens are going to lose their pick for nothing at all, because of how a GM their fans didn’t like screwed up a trade his team wasn’t even involved in.—
Sean McIndoe,
New York Times,
11 Mar. 2026
-
And gun-safety groups say that anything that makes the rules more complicated and unclear could really screw up the system.—
Nina Totenberg,
NPR,
2 Mar. 2026
Verb
-
Wild turkeys gobbled up Staten Island straphangers’ time on Monday, after a flock fouled up service on the Staten Island Railway.—
Evan Simko-Bednarski,
New York Daily News,
17 Mar. 2026
-
Karaban almost had a costly turnover on an inbound play with 14 seconds left, but the Huskies fouled up three and Mulready split his free throw attempts, setting up the game-clinching freebies from the Huskies’ captain.—
Joe Arruda,
Hartford Courant,
15 Feb. 2026
Verb
-
The evening's historic tie almost gets totally ruined For only the seventh time in history, the Oscar vote ended in a tie.—
Kelly Lawler,
USA Today,
16 Mar. 2026
-
However, for some, gambling is an addiction that can ruin lives and families.—
Don Sweeney,
Sacbee.com,
15 Mar. 2026
Verb
-
Cheap Chinese cars are at our doorstep, and no one is buying those electric pickups GM booted the Bolt for.—
Joel Feder,
The Drive,
12 Mar. 2026
-
If the judge rules in favor of Pembroke Park, a town south of Hollywood, the town commission can vote to boot Jacobs as mayor.—
Amanda Rosa,
Miami Herald,
11 Mar. 2026
Cite this Entry
“Muck up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/muck%20up. Accessed 19 Mar. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
