"doesn't know his ass from his elbow" in Spanish
Definition
Esta expresión informal y humorística significa que alguien es completamente ignorante o no tiene ni idea, especialmente sobre lo que se espera que sepa o haga.
Usage Notes (Spanish)
Muy informal y un poco insultante; se usa humorísticamente para señalar a alguien muy ignorante o despistado en algo importante. No es apropiado para contextos formales. Es común en frases como: 'No sabe ni dónde tiene la cabeza en matemáticas.'
Examples
He doesn't know his ass from his elbow when it comes to cooking.
En la cocina, **no sabe ni dónde tiene la cabeza**.
My boss doesn't know his ass from his elbow about computers.
Mi jefe **no sabe nada** de computadoras.
She doesn't know her ass from her elbow in math class.
En clase de matemáticas, **no tiene ni idea**.
Honestly, he doesn't know his ass from his elbow when fixing cars, so don't ask him for help.
La verdad, él **no sabe nada** de arreglar coches, así que no le pidas ayuda.
I tried to explain it, but she doesn't know her ass from her elbow on this topic.
Intenté explicarlo, pero en este tema **no sabe nada**.
You can tell he doesn't know his ass from his elbow just by the way he answers questions.
Se nota que **no tiene ni idea** solo por cómo responde a las preguntas.