1
as in to act out
to behave badly
the two-year-old was acting up in church so much that her dad had to take her outside
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in to cut up
to engage in attention-getting playful or boisterous behavior
you should have seen the boys acting up when they put on their aprons
Synonyms & Similar Words
Example Sentences
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Recent Examples of act up
The elbows acted up again this past offseason, forcing Stanton to stop swinging a few weeks before reporting to spring training.
—
Gary Phillips, New York Daily News, 14 Mar. 2025
The sisters may have spent weeks teasing the first single off their new album through several funny little videos and familiar-looking album art, but the tell-tale sign of new Haim music is when the weather gets good and people feel like acting up.
—Fran Hoepfner, Vulture, 12 Mar. 2025
In recent weeks, we are told that Phillips has at points been acting up for Moore after Moore broke her ankle while skiing, and she is understood to have been dipping her toe into drama.
—Max Goldbart, Deadline, 28 Feb. 2025
This includes Isla having to do damage control when the team’s star acts up off the court, and dealing with an overbearing parent of a player.
—Greg Rosenstein, NBC News, 27 Feb. 2025
See All Example Sentences for act up
Gary Phillips, New York Daily News, 14 Mar. 2025
The sisters may have spent weeks teasing the first single off their new album through several funny little videos and familiar-looking album art, but the tell-tale sign of new Haim music is when the weather gets good and people feel like acting up.
—Fran Hoepfner, Vulture, 12 Mar. 2025
In recent weeks, we are told that Phillips has at points been acting up for Moore after Moore broke her ankle while skiing, and she is understood to have been dipping her toe into drama.
—Max Goldbart, Deadline, 28 Feb. 2025
This includes Isla having to do damage control when the team’s star acts up off the court, and dealing with an overbearing parent of a player.
—Greg Rosenstein, NBC News, 27 Feb. 2025
See All Example Sentences for act up
Recent Examples of Synonyms for act up
Verb
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One theory the documentary presented was that Lewis acted out in revenge against Johnson & Johnson, Tylenol’s parent company.—
Stephanie Nolasco,
FOXNews.com,
25 May 2025
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The accompanying video pays tribute to the popular anime Death Note and features the pair acting out a fan’s fan fiction.—
Brittany Spanos,
Rolling Stone,
22 May 2025
Verb
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Congress is currently debating a federal budget plan that could cut up to $1 billion from the National Park Service.—
Trevor Hughes,
USA Today,
22 May 2025
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Original price: $499.99 (Amazon) The Greenworks 21-inch lawn mower runs on batteries, and can cut up to half an acre on a full charge.—
Christopher Murray,
FOXNews.com,
28 Mar. 2025
Verb
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The pants have a supportive high-waist design, plus the tapered legs will show off sneakers, sandals, and more summer shoes.—
Nicol Natale,
People.com,
26 May 2025
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Google also recently showed off Google Beam—a way to convert people in video calls to appear more 3D and lifelike for a more personal touch.—
Luke Larsen,
Wired News,
25 May 2025
Verb
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Four people are facing charges in Louisiana for horsing around in a small-town Walmart last week. Video that was posted on TikTok and went viral on social media showed three men and a teenage boy riding horses through the business in Baker, Louisiana.—
Elizabeth Pritchett,
FOXNews.com,
16 Apr. 2025
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Quit horsing around — the Clydesdales are back!—
Breanne L. Heldman,
People.com,
10 Feb. 2025
Verb
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The judge, Yvonne Gonzalez Rogers of U.S. District Court for the Northern District of California, rebuked Apple for thwarting a previous ruling in the lawsuit and said the company needed to be stopped from further disobeying the court.—
Tripp Mickle,
New York Times,
1 May 2025
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She was taken to Troop A in Southbury and charged with engaging police in pursuit, interfering with an officer, disobeying the signal of an officer, operation of a motor vehicle under suspension and operation of a motor vehicle without minimum insurance.—
Justin Muszynski,
Hartford Courant,
25 Apr. 2025
Verb
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The Five Stripes will look to carry on that form against Orlando, but the Lions will not be taking this matchup lightly.—
Kyle Foley,
The Orlando Sentinel,
27 May 2025
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The audience was small, and for a portion of its run the show was carried on PBS—awkward, since its host was generally an opponent of government spending.—
Louis Menand,
New Yorker,
26 May 2025
Verb
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Its stories about an amateur tennis pro from a low-to-middle class family and his relationship with an artist looking to rebel against her family’s upper-class attitudes took advantage of their youthful vision to tell more stories about their parents’ lack of ambition.—
Wilson Chapman,
IndieWire,
20 May 2025
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Related article Mavericks fans rebelled after Luka Dončić was traded.—
Matias Grez,
CNN Money,
14 May 2025
Cite this Entry
“Act up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/act%20up. Accessed 4 Jun. 2025.
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