not know one’s ass from a hole in the ground

tv. not to be knowledgeable; not to be alert and effective. (Usually objectionable.) That stupid son of a bitch doesn’t know his ass from a hole in the ground.

Common Names:

Name	Pronounced	Usage
Zenon	ZE-nawn (Polish)	Ancient Greek, Polish
Vergil	VUR-jəl	English
Lucille	loo-SEEL	French, English
Tori	TAWR-ee	English
Evridiki	-	Greek
Henriette	awn-ree-ET (French), hen-ree-E-tə (German), hen-ree-ED-de (Danish), hen-ree-ET-te (Norwegian)	French, German, Dutch, Danish, Norwegian