dig one's own grave

dig (one's) own grave

To do something that has or will have negative consequences that are easily able to be foreseen. If you don't turn in your project, you're digging your own grave. There's no way you'll get a decent grade without it! I'm afraid I'm digging my own grave by turning down the promotion.
See also: dig, grave, own
Farlex Dictionary of Idioms.

dig one's own grave

Seriously harm oneself, cause one's own ruin or downfall. For example, If Sam pursues that course, he'll be digging his own grave. [First half of 1900s]
See also: dig, grave, own
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • dig (one's) own grave
  • dig own grave
  • dig your own grave
  • funeral
  • be (someone's) funeral
  • it's someone's funeral
  • expose (someone, something, or oneself) to (someone or something)
  • expose to
  • get away with murder
  • grub for (something)