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]
Words nearby dig one's own grave
diflunisal,
difunctional,
dig,
dig down,
dig in,
dig one's own grave,
dig out,
dig up,
dig.,
digambara,
digamma