Digging your own grave 

Getting one's self into serious trouble, especially when doing something bad or not what you're supposed to do.

"I'm gonna go and egg that guy's house."
Careful, man. You're digging your own grave doing shit like that.

Digging your own grave by Suburbanz71 May 31, 2019

Digging your own grave 

Digging your own grave means doing smth. that is going to effect you negatively

-Nick Cannon:”I will diss Eminem ob my song’The Invitation’”
+”You are digging your own grave ,man”

Digging your own grave by Affan was here December 13, 2019

digging your own grave with your mouth

A metaphorical phrase to describe the common practice of eating yourself to death.

Well my friend, it seems that you are highly unable to stop digging your own grave with your mouth!

digging your own grave with your mouth by Dr Bunnygirl October 2, 2019