run rampant

English

run rampant (third-person singular simple present runs rampant, present participle running rampant, simple past ran rampant, past participle run rampant)

(idiomatic) To go unchecked or without control; to be wild or excessive.
The weeds have long run rampant in the garden and it would be difficult to regain control.
- 2012 March, William E. Carter, Merri Sue Carter, “The British Longitude Act Reconsidered”, in American Scientist‎^[1], volume 100, number 2, page 87:
  Conditions were horrendous aboard most British naval vessels at the time. Scurvy and other diseases ran rampant, killing more seamen each year than all other causes combined, including combat.