let (someone) loose (on something)(redirected from let her loose)
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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!
(with something) Go to let go (with something).