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

1.
自掘墳墓, 自毀前程
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.
如果你拒絕與團隊合作,你就是在自掘墳墓。
•
Raising prices too much could cut your own throat by driving customers away.
價格漲得太高可能會自毀前程,把顧客都趕走。