let (someone) loose (on something)(redirected from let him loose on something)
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let (someone) loose (on something)
To allow someone to do something as they please, without supervision or control. It's so nice to go to the park and let the kids loose for a while. I hope the board of directors aren't let loose on our project. We can't afford to have them changing things last minute!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
(with something) Go to let go (with something).
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
let ˈloose(British English) (American English cut ˈloose) (informal) do something or happen in a way that is not controlled: Teenagers need a place to let loose.
Farlex Partner Idioms Dictionary © Farlex 2017