dig your own grave
US /dɪɡ jʊər oʊn ɡreɪv/
UK /dɪɡ jʊər oʊn ɡreɪv/

1.
scavarsi la fossa, rovinarsi con le proprie mani
to do something that will cause you problems or failure in the future
:
•
If you keep lying to your boss, you're just going to dig your own grave.
Se continui a mentire al tuo capo, ti stai solo scavando la fossa.
•
By refusing to compromise, the politician was digging his own grave with the voters.
Rifiutandosi di scendere a compromessi, il politico si stava scavando la fossa con gli elettori.