cut your own throat
US /kʌt jʊər oʊn θroʊt/
UK /kʌt jʊər oʊn θroʊt/

1.
cavarse la propia tumba, perjudicarse a sí mismo
to do something that will cause your own failure or downfall
:
•
If you refuse to cooperate with your team, you'll be cutting your own throat.
Si te niegas a cooperar con tu equipo, estarás cavando tu propia tumba.
•
Raising prices too much could cut your own throat by driving customers away.
Subir demasiado los precios podría perjudicarte al ahuyentar a los clientes.