get away with murder
US /ɡɛt əˈweɪ wɪð ˈmɜːrdər/
UK /ɡɛt əˈweɪ wɪð ˈmɜːrdər/
1.
to do something very bad or wrong and not be punished for it
:
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He's always late, but because he's the boss's son, he seems to get away with murder.
•
Some students try to get away with murder by cheating on exams, but they usually get caught.