dig (one's) own grave

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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

dig one's own grave

Fig. to be responsible for one's own downfall or ruin. If you try to cheat the bank, you will be digging your own grave. Those politicians have dug their own grave with their new tax bill. They won't be reelected.
See also: dig, grave, own

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

dig your own grave

If you dig your own grave, you create serious problems for yourself by doing something foolish. I don't feel sorry for him — he's dug his own grave as far as I'm concerned.
See also: dig, grave, own

dig your own grave

do something foolish which causes you to fail or leads to your downfall.
1995 Colin Bateman Divorcing Jack Then I thought about Patricia again and how much I was missing her and how I'd dug my own grave over the phone.
See also: dig, grave, own

dig your own ˈgrave

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dig a ˈgrave for yourself

do something that will bring harm to yourself: If you give up your job now, you’ll be digging your own grave, because you won’t find it easy to get another one.
See also: dig, grave, own
References in classic literature ?
Nevertheless, by the time I had buried the last of my companions my stock of provisions was so small that I hardly thought I should live long enough to dig my own grave, which I set about doing, while I regretted bitterly the roving disposition which was always bringing me into such straits, and thought longingly of all the comfort and luxury that I had left.
They gave me a hoe and said I has to dig my own grave," he said.
First I dug a hole three feet long, three feet wide and three feet deep, laughing with morbid humor at the thought that Dad had cleverly gotten me to dig my own grave.