let loose something
let (something) loose
1. To do something in a sudden, fierce, and/or uncontrolled manner; to unleash something, especially that which is violent or destructive. The trapped wolf let loose a bone-chilling howl. The home team began to let loose an unwavering offensive barrage against their cross-town rivals. The owner of the ranch let his hounds loose upon the trespassers.
2. To allow something to spread, grow, or develop in a wild or uncontrolled manner, especially that which is destructive or ruinous. With news of the military junta's governmental overthrow, a wild, riotous pandemonium was let loose across the already unstable country.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
let ˈloose somethingmake a noise or remark, especially in a loud or sudden way: She let loose a stream of abuse.
Farlex Partner Idioms Dictionary © Farlex 2017