go off the rails

US /ɡoʊ ɔf ðə reɪlz/
UK /ɡoʊ ɔf ðə reɪlz/
"go off the rails" picture
1.

sair dos trilhos, desencarrilhar

to start behaving in a way that is not acceptable or expected, especially in a wild or uncontrolled way

:
After his parents' divorce, he really started to go off the rails.
Depois do divórcio dos pais, ele realmente começou a sair dos trilhos.
The project seemed to go off the rails when the main manager left.
O projeto pareceu sair dos trilhos quando o gerente principal saiu.