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

Allowing these scams to run rampant over our society is also a choice, one of having regulatory authorities move too slowly or be understood too narrowly to tackle it. —Orlando Sentinel and New York Daily News Editorial Boards, Orlando Sentinel, 13 July 2024

What happened near Barrington Lake that day isn't fully clear, at least to the public — though local speculation has run rampant. —Keith Matheny, Detroit Free Press, 12 July 2024

Flag violations: Chances are most Americans have violated United States flag code, as violations run rampant on the Fourth of July. —Ray Padilla, The Courier-Journal, 4 July 2024

Invasive axis deer run rampant on Maui and other Hawaiian islands, according to the Associated Press. —Kerry Breen, CBS News, 2 July 2024