the die is cast
US /ðə daɪ ɪz kæst/
UK /ðə daɪ ɪz kæst/
1.
an unchangeable decision has been made or an irreversible action has been taken
:
•
After submitting my resignation, I knew the die was cast and there was no turning back.
•
Once you sign the contract, the die is cast, and you're committed to the terms.