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
Maybe one party simply wants out for no apparent reason Anything can louse up the deal.
—
Lew Sichelman, Miami Herald, 28 May 2026
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
Lew Sichelman, Miami Herald, 28 May 2026
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
Recent Examples of Synonyms for louse up
Verb
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Chip stocks, however, stumbled; bitcoin is hovering at its weakest since the war began, private credit is throwing off sparks again — and a flesh-eating parasite has turned up in Texas.—
Anniek Bao,
CNBC,
5 June 2026
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The goal of the game is to land the stunt successfully without stumbling.—
Skyler Caruso,
PEOPLE,
4 June 2026
Verb
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During Miami’s two periods of special teams work Malik Washington fumbled his first kickoff return, but most of the other punt returners and kickoff returned fielded their attempts well.—
Omar Kelly,
Miami Herald,
2 June 2026
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But then again, neither is the Bears fumbling and bumbling.—
Jon Greenberg,
New York Times,
2 June 2026
Verb
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Other common soccer penalties include tripping, kicking, holding or pulling jerseys, pushing or charging players, and dangerous plays like high kicks or kicking near another player's head.—
Irene Wright,
USA Today,
9 June 2026
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Britain’s Katie Boulter and Turkey’s Zeynep Sonmez tripped over Lacoste signs during their early round matches.—
Lev Akabas,
Sportico.com,
7 June 2026
Verb
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In the Bay Area, fire and police departments in San Jose, Oakland and San Francisco have blown past their overtime budgets by tens of millions of dollars in recent years.—
Ethan Varian,
Mercury News,
9 June 2026
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Each basket drew a huge applause from the championship-hungry Garden crowd, including his slam in the final minutes of the first half after blowing by unanimous Defensive Player of the Year Victory Wembanyama.—
Fiifi Frimpong,
New York Daily News,
9 June 2026
Verb
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Detroit did slip up in Game 5 at Little Caesars Arena, although Detroit blew a 60-52 halftime lead in that contest.—
Juan Carlos Blanco,
Forbes.com,
17 May 2026
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What makes all this so engaging is the knowledge that eventually, one side or the other will slip up and people will get hurt, and the confidence that Nemesis’s inner world is so vibrant that the fallout will just be as compelling as the lead-up.—
Roxana Hadadi,
Vulture,
14 May 2026
Verb
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But four years ago, Sorsby screwed up in a massive way.—
Trey Wallace OutKick,
FOXNews.com,
2 June 2026
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The two screwed up a top-rope stunner as Excalibur struggled to explain what happened like a 2026 Jim Ross.—
Alfred Konuwa,
Forbes.com,
24 May 2026
Verb
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Years earlier, in 2001, the undercover detective involved claimed her career had been ruined by the case, and received around $166,000 in an out-of-court settlement, per the BBC.—
Caroline Blair,
PEOPLE,
7 June 2026
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Think about it the next time a presidential rant ruins your coffee.—
Steven Andreasen,
Twin Cities,
7 June 2026
Verb
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In the end, though, neither an explosion nor a giant spill of fluid that could foul up waterways and the ocean occurred.—
Hannah Fry,
Los Angeles Times,
27 May 2026
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An incorrect connection or approach can foul up a line, damage a plane or cause an accident.—
Tara Copp The Washington Post,
Arkansas Online,
25 May 2026
Cite this Entry
“Louse up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/louse%20up. Accessed 10 Jun. 2026.
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