not know one's ass from one's elbow

영어로 "not know one's ass from one's elbow"의 정의와 의미

not know one's ass from one's elbow
01

to be incapable of understanding even the simplest concepts

{not} [know] {one's} ass from {one's} elbow definition and meaning
IdiomIdiom
OffensiveOffensive
example
예시들
Do n't ask him for directions; he's hopeless with maps and does n't know his ass from his elbow when it comes to navigating.
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