تلاش کریں
not know one's arse from one's elbow
01
to show a great lack of intelligence or poor judgment
![{not} [know] {one's} arse from {one's} elbow definition and meaning](https://cdn.langeek.co/photo/44844/original/?type=jpeg "{not} [know] {one's} arse from {one's} elbow definition and meaning")
Example
Do n't take his word for it — he does n't know his arse from his elbow.
Not knowing his rase from his elbow, he stepped forward to lecture me.
You sent us an amateur who did n't know his arse from his elbow.
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