1
as in to stumble
to make a mistake
everything is riding on this project, so we can't afford to louse up
Synonyms & Similar Words
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2
as in to fumble
to make or do (something) in a clumsy or unskillful way
I loused up the wallpapering job in the bedroom—the seams show too much
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of louse up
Which is to say that America’s most prominent vaccine skeptic could have the power to upend, derail, or otherwise louse up a cornerstone of public health.
—
Daniel Engber, The Atlantic, 20 Nov. 2024
Conversely, one of the easiest ways to louse up a team on draft day is to load up a team with players who aren’t going to produce at a level commensurate with when they were drafted.
—Gary Davenport, The Athletic, 5 Aug. 2024
Daniel Engber, The Atlantic, 20 Nov. 2024
Conversely, one of the easiest ways to louse up a team on draft day is to load up a team with players who aren’t going to produce at a level commensurate with when they were drafted.
—Gary Davenport, The Athletic, 5 Aug. 2024
Recent Examples of Synonyms for louse up
Verb
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Government agencies and businesses that invest in this training, and that insist every critical number survives a deterministic check, will capture AI's benefits without stumbling into its blind spots.—
Arkansas Online,
Arkansas Online,
8 Jan. 2026
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Dodge, still suffering the consequences of axing the popular previous generations of Charger and Challenger muscle cars, saw sales stumble down 28% compared with the previous year.—
Liam Rappleye,
USA Today,
8 Jan. 2026
Verb
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Beauty products have taken over my sink, leaving me fumbling for my go-to face washes and serums every morning and night.—
Jacqueline Tempera,
Better Homes & Gardens,
14 Jan. 2026
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The Steelers failed to capitalize on the miscues from a jittery Stroud, who fumbled twice and threw a pick deep in Pittsburgh territory.—
Los Angeles Times,
Los Angeles Times,
13 Jan. 2026
Verb
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Dellandrea was injured in the Sharks’ game on Tuesday against the Columbus Blue Jackets as his right leg struck the post after he was inadvertently tripped while driving to the net.—
Curtis Pashelka,
Mercury News,
10 Jan. 2026
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Any tease that the movie could possibly be about anything more — a love triangle, a recently deceased mother, a vet’s puzzlement that Hawaii doesn’t even have rabies — is nothing but a banana peel tripping the audience into expecting a narrative.—
Amy Nicholson,
Los Angeles Times,
9 Jan. 2026
Verb
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Texans defensive lineman Sheldon Rankins picked the ball up and ran it to the end zone for what felt like the knockout blow even though there was still a lot of time left to play.—
Ryan Gaydos,
FOXNews.com,
13 Jan. 2026
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Federal officers fired tear gas Monday to break up a crowd of whistle-blowing bystanders in Minneapolis who showed up to see the aftermath of a car crash involving immigration agents, just a few blocks from where Good was fatally shot.—
WCCO Staff,
CBS News,
13 Jan. 2026
Verb
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The Indianapolis Colts, Miami Dolphins and Baltimore Ravens also need to slip up.—
Skyler Caruso,
PEOPLE,
12 Dec. 2025
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Verstappen and Piastri would need Norris to really slip up to have a better chance at winning the championship, but the British superstar driver held it together and claimed the first F1 title of his career.—
Ryan Gaydos,
FOXNews.com,
7 Dec. 2025
Verb
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Tim overcame his fear of screwing up again and asked Lucy to move in.—
Nellie Andreeva,
Deadline,
6 Jan. 2026
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Jessica and Ashlee Simpson, ‘The Little Drummer Boy’ There really aren’t many ways to screw up a straightforward ballad that needs only a rolling snare drum as required instrumentation, but leave it to the Simpson sisters circa 2004 to burn it all down.—
Melissa Ruggieri,
USA Today,
4 Dec. 2025
Verb
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And, from this week’s issue, Nicola Twilley’s reporting on another lingering effect of the wildfires—smoke taint that is ruining grapes and threatening California’s wine industry.—
Dana Goodyear,
New Yorker,
7 Jan. 2026
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This will either change your life or ruin you.—
Outside Online,
Outside Online,
7 Jan. 2026
Verb
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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
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Year-long court battles have been waged over exactly how clean the water in the Everglades has to be without fouling up the whole system.—
Alex Harris
July 3,
Miami Herald,
3 July 2025
Cite this Entry
“Louse up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/louse%20up. Accessed 17 Jan. 2026.
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