do the dirty on
US /duː ðə ˈdɜːr.t̬i ɑːn/
UK /duː ðə ˈdɜːr.t̬i ɑːn/

1.
fare uno sgarbo a, tradire
to treat someone unfairly or badly, especially by cheating them or betraying them
:
•
I can't believe he did the dirty on his own brother by stealing his business idea.
Non posso credere che abbia tradito suo fratello rubando la sua idea di business.
•
The company did the dirty on its employees by cutting their benefits without warning.
L'azienda ha fatto uno sgarbo ai suoi dipendenti tagliando i loro benefit senza preavviso.