get away with murder
US /ɡɛt əˈweɪ wɪð ˈmɜːrdər/
UK /ɡɛt əˈweɪ wɪð ˈmɜːrdər/

1.
farla franca, passarla liscia
to do something very bad or wrong and not be punished for it
:
•
He's always late, but because he's the boss's son, he seems to get away with murder.
È sempre in ritardo, ma siccome è il figlio del capo, sembra farla franca.
•
Some students try to get away with murder by cheating on exams, but they usually get caught.
Alcuni studenti cercano di farla franca imbrogliando agli esami, ma di solito vengono scoperti.