as in to fumble
to make or do (something) in a clumsy or unskillful way
I swear, she mucks up everything she tries
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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
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The attempt to create a viable and vibrant residential hub arrives after years of neglect and fumbled strategies by the prior owner, an affiliate of real estate firm Z&L Properties.—
George Avalos,
Mercury News,
5 Feb. 2026
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The Blue Demons’ guard panicked, fumbling the ball, and Fudd read her perfectly.—
Emily Adams,
Hartford Courant,
5 Feb. 2026
Verb
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There was a short pursuit on the freeway, which ended when a tire blew on the SUV.—
Karen Kucher,
San Diego Union-Tribune,
10 Feb. 2026
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Taubitz remains the one to beat, but after her teammate faltered on her third run, the medal competition was blown open.—
Sean Nevin,
NBC news,
10 Feb. 2026
Verb
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The climate may get screwed up in new ways as scientists attempt to turn the planet’s temperature dial down.—
Christian Elliott,
The Atlantic,
31 Jan. 2026
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What Mager is showing here is the difference between kids and adults, the openness and willingness to be bold and confront things head on with matter-of-fact honesty in a world that is being screwed up by their elders and those in charge.—
Pete Hammond,
Deadline,
26 Jan. 2026
Verb
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The funding lapse led to delayed or suspended economic data, wreaked havoc at airports as flights were canceled due to air traffic controller shortages and fouled up the Supplemental Nutrition Assistance Program.—
Fred Imbert,
CNBC,
13 Nov. 2025
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Also, if Utah or Miami were to score an upset in the opening round, St. Louis would have first dibs at taking that team instead of Orlando, which would foul up these predictions completely.—
Todd Boss,
Forbes.com,
15 Aug. 2025
Verb
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Romero’s red card for a foul on Casemiro in the 29th minute of Tottenham’s defeat to Manchester United on Saturday ruined Frank’s game plan.—
Jay Harris,
New York Times,
8 Feb. 2026
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Applying baking soda to some surfaces or materials could ruin it, scratch it or lose its shine, according to the pros.—
Lauren David,
Southern Living,
7 Feb. 2026
Verb
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In fact, the IOC might consider booting the sport altogether in June.—
Dana ONeil,
CNN Money,
10 Feb. 2026
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Patriots rookie Andy Borregales booted the ball into the endzone for a touchback.—
February 9,
CBS News,
9 Feb. 2026
Cite this Entry
“Muck up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/muck%20up. Accessed 15 Feb. 2026.
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