Rechercher
not know one's ass from one's elbow
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](https://cdn.langeek.co/photo/44844/original/?type=jpeg "{not} [know] {one's} ass from {one's} elbow definition and meaning")
Idiom
OffensiveWhat is the origin of the idiom "not know one's ass from one's elbow" and when to use it?
The origin of the idiom "not know one's ass from one's elbow" is not exactly known. It is a vulgar and humorous way of saying that someone is completely clueless or ignorant.The phrase uses the anatomical terms "ass" (buttocks) and "elbow" to create a comically exaggerated image of someone who can't distinguish between two very different body parts, symbolizing a lack of basic knowledge or common sense. This idiomatic phrase is used to express strong disapproval or frustration with someone's incompetence or lack of understanding.
Example
I asked him to fix the computer, but he does n't know his ass from his elbow when it comes to technology.
She claimed to be an expert chef, but she could n't even boil water.
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.
