שָׂכַל (sakhal): This word translates literally as "intellect" or "mind," but it's often used derisively to mean someone who lacks intelligence. You might hear someone say, "זײַן שָׂכַל איז נישט אַזוי גוט" (zayn sakhal iz nisht azoy gut), meaning "Their mind isn't so good."
However, it's important to note that "sakhal" can also be used in a neutral way, simply referring to someone's intellect.
Here are some other Yiddish terms that could be used to describe a dimwit, depending on the context:
* טיפּשׁ (tipsh): Means "stupid" or "foolish."
* דאָפּפּעלט (doppelt): Literally means "double," but it's used as a slang term to refer to someone who's slow or naive.
* נאַריש (narish): Means "foolish" or "silly."
* פּאַפּוגײַ (papugai): Means "parrot," used to refer to someone who repeats everything they hear without understanding.
* אַ פּאָפּעל (a poppel): Means "a dope" or "a fool."
The specific word used would depend on the tone and the context of the situation.
It's crucial to remember that using any of these terms can be considered offensive, especially if you're not close to the person you're talking about. It's always best to be respectful and avoid using hurtful language.