not know one's ass from one's elbow

Định nghĩa và ý nghĩa của "not know one's ass from one's elbow"trong tiếng Anh

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
Các ví dụ
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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