loose cannon
US /luːs ˈkæn.ən/
UK /luːs ˈkæn.ən/
1.
bala perdida, persona impredecible
a person who is unpredictable and can cause damage if not controlled
:
•
He's a real loose cannon; you never know what he's going to do next.
Es un verdadero bala perdida; nunca sabes lo que va a hacer después.
•
The new manager is a bit of a loose cannon, making decisions without consulting anyone.
El nuevo gerente es un poco bala perdida, tomando decisiones sin consultar a nadie.