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
Jae	JAY	English (Rare)
Huan	-	Chinese
Arin	-	English (Rare)
Alan	['ælən]
Persis	-	Biblical, Biblical Greek
Alberte (2)	-	French, Danish