let somebody/something loose
US /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/
UK /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/

1.
melepaskan, membiarkan bebas
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.
Penjaga kebun binatang memutuskan untuk melepaskan hewan-hewan di kandang yang lebih besar.
•
Once he gets a microphone, he just lets himself loose and talks for hours.
Begitu dia mendapatkan mikrofon, dia langsung melepaskan diri dan berbicara berjam-jam.