run rampant

phrase

: 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

But the instances of godly intervention that run rampant in Homer’s poem are deliberately vague in Nolan’s telling, if not excised entirely. — Louis Peitzman, Vulture, 17 July 2026

With this latest hospitalization, combined with the little information Americans can find on it, speculation on his health has run rampant. — Alyssa Goldberg, USA Today, 8 July 2026

Dozens of armed groups run rampant in Port-au-Prince and surrounding areas, extorting businesses, kidnapping people and driving farmers off their land. — Caitlin Stephen Hu, CNN Money, 6 Apr. 2026

Crypto and phishing scams also run rampant on the microblogging site. — Victor Tangermann, Futurism, 2 Apr. 2026