run rampant
idiom
: to be very common or to spread very quickly and in a way that is difficult to control
Rumors of her engagement ran rampant.
Examples of run rampant in a Sentence
Recent Examples on the Web
Rumors run rampant In the absence of clear guidance from the Trump administration, rumors have been running rampant about the future of the space agency.
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Ars Technica, 3 Feb. 2025
That said, conspiracy theories had run rampant online, including by lawmakers.
—Jonathan Granoff, Newsweek, 28 Jan. 2025
Communication issues and cosmic run-ins will further run rampant by the time Mercury stations retrograde in Aries on March 29.
—Roya Backlund, StyleCaster, 23 Dec. 2024
The case is a class action suit, brought by several current and former inmates at a women’s prison, against the private contractor that ran the place and allowed abuse to run rampant.
—Noel Murray, Vulture, 7 Nov. 2024
See all Example Sentences for run rampant 
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Ars Technica, 3 Feb. 2025
That said, conspiracy theories had run rampant online, including by lawmakers.
—Jonathan Granoff, Newsweek, 28 Jan. 2025
Communication issues and cosmic run-ins will further run rampant by the time Mercury stations retrograde in Aries on March 29.
—Roya Backlund, StyleCaster, 23 Dec. 2024
The case is a class action suit, brought by several current and former inmates at a women’s prison, against the private contractor that ran the place and allowed abuse to run rampant.
—Noel Murray, Vulture, 7 Nov. 2024
See all Example Sentences for run rampant
Dictionary Entries Near run rampant
Cite this Entry
“Run rampant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/run%20rampant. Accessed 16 Feb. 2025.
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