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

1.
sair impune, escapar ileso
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.
Ele está sempre atrasado, mas como é filho do chefe, parece sair impune.
•
Some students try to get away with murder by cheating on exams, but they usually get caught.
Alguns alunos tentam sair impunes trapaceando em exames, mas geralmente são pegos.