let somebody/something loose

US /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/
UK /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/
"let somebody/something loose" picture
1.

放す, 解き放つ

to allow a person or animal to be free, or to allow something to be used or to happen without control

:
The zookeepers decided to let the animals loose in the larger enclosure.
動物園の飼育員は、より広い囲いに動物たちを放すことにした。
Once he gets a microphone, he just lets himself loose and talks for hours.
マイクを手にすると、彼はただ自分を解き放ち、何時間も話す。