know one’s ass from a hole in the ground

tv. to be knowledgeable; 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
Lindsay	['linzi]
Lucjusz	LUWTS-yuwsh	Polish
Tihomir	-	Croatian, Bulgarian, Serbian, Macedonian
Clem	KLEM	English
RÍOghnach	-	Irish Mythology
Alden	['ɔ:ldən]