let somebody/something loose

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

soltar, dar rédea solta a

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.
Os tratadores do zoológico decidiram soltar os animais no recinto maior.
Once he gets a microphone, he just lets himself loose and talks for hours.
Assim que ele pega um microfone, ele simplesmente se solta e fala por horas.