dig your own grave
idiomPart ofdig
dig your own grave — idiom
1. to do something that will cause serious problems for yourself in the future, esp
1.idiom
Definition
to do something that will cause serious problems for yourself in the future, especially by acting in a way that seems to help you now but will hurt you later
Example
The politician dug his own grave by lying to the public about his past.
If you keep spending more than you earn, you are digging your own grave financially.