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

The rumors of cheating with addresses and recruiting players have run rampant, but many schools do it. — Chris Hays, The Orlando Sentinel, 25 July 2026

Speculation among Marvel fans has run rampant since the announcement that Sink would appear in the film. — Joey Nolfi, Entertainment Weekly, 20 July 2026

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