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]

Common Names:

Name	Pronounced	Usage
Svanhild	-	Norwegian, Norse Mythology
Cecelia	sə-SEE-lee-ə, sə-SEEL-yə	English
Gianmarco	jahn-MAHR-ko	Italian
Lexus	LEKS-əs	English
Nikolche	-	Macedonian
Ottoline	-	English (Rare)