1
as in acting 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 cutting 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 acting up
Its general sensibility seems more Superstore than The Office, down to the interstitial montages of customers acting up in the perpetually overcrowded waiting room.
—
Angie Han, HollywoodReporter, 13 Oct. 2025
Sturm said his back started acting up after the team’s first practice.
—Michael Russo, New York Times, 1 Oct. 2025
Mature parents do not slap their children across the face for acting up.
—Jeanne Phillips, Mercury News, 25 Sep. 2025
Then the engine started acting up, which would have cost up to $10,000 to fix.
—Shannon Pettypiece, NBC news, 22 Sep. 2025
Johnson, who struggles with a neuroma, swears by her Oofos mules to keep it from acting up.
—Jennifer Heimlich, SELF, 29 Aug. 2025
Angie Han, HollywoodReporter, 13 Oct. 2025
Sturm said his back started acting up after the team’s first practice.
—Michael Russo, New York Times, 1 Oct. 2025
Mature parents do not slap their children across the face for acting up.
—Jeanne Phillips, Mercury News, 25 Sep. 2025
Then the engine started acting up, which would have cost up to $10,000 to fix.
—Shannon Pettypiece, NBC news, 22 Sep. 2025
Johnson, who struggles with a neuroma, swears by her Oofos mules to keep it from acting up.
—Jennifer Heimlich, SELF, 29 Aug. 2025
Recent Examples of Synonyms for acting up
Verb
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The actors joked about how trying to put on medical gloves quickly enough while remembering and acting out dialogue can make scenes go sideways in a heartbeat.—
Georg Szalai,
HollywoodReporter,
30 Dec. 2025
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This world is rarely gentle to people who are hurt, vulnerable, acting out.—
Wesley Stenzel,
Entertainment Weekly,
24 Dec. 2025
Verb
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Meanwhile, as all of this is happening, Meredith is cutting up with the other ladies at the spa, without a care in the world.—
Tom Smyth,
Vulture,
31 Dec. 2025
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Ford is planning on cutting up to 1,000 roles in electric-vehicle production in Germany.—
Hugh Cameron,
MSNBC Newsweek,
16 Sep. 2025
Verb
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Hawaii prevents concealed carry permit holders from carrying on private property without the owner’s express consent, either verbally or via hanging a sign.—
Zach Schonfeld,
The Hill,
11 Jan. 2026
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The notebook includes not just copies of letters in the Watkins papers but Virginia’s meticulous record of her fact-checking and her correspondence with Polly about the book’s success, spin-offs, sequels, and other projects carrying on to Polly’s death in 1962.—
Literary Hub,
Literary Hub,
7 Jan. 2026
Verb
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In response, the Indiana chapter of the American Civil Liberties Union, which represents Pakota Valley, filed a new lawsuit against the policy and filed a motion alleging the city is disobeying court orders.—
Cate Charron,
IndyStar,
6 Jan. 2026
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He is also accused of disobeying a superior officer and making a false official statement.—
Cybele Mayes-Osterman,
USA Today,
9 Dec. 2025
Verb
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Sydney also posted a photo of her walking through the hallways, showing off her pajamas — which perfectly match her daughter's onesie.—
Raven Brunner,
PEOPLE,
8 Jan. 2026
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Bieber’s matching barely-there thong was connected to it through a web of black strings on her stomach, showing off her abs and highlighting a pink bow adornment in the center.—
Lara Walsh,
InStyle,
7 Jan. 2026
Verb
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Gisin hopes that by fooling around with measurements of these more exotic states, physicists will come to better understand the role of measurement in general.—
Quanta Magazine,
Quanta Magazine,
8 Aug. 2025
Cite this Entry
“Acting up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/acting%20up. Accessed 19 Jan. 2026.
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