How to Say “You’re so Dumb” in Spanish

eres tan tonto
/eɾes tan tonto/from spelling rules
The English phrase "you're so dumb" is translated into Spanish as eres tan tonto.
This is an insulting statement used to tell someone that they lack intelligence. While eres tan tonto is a direct way to say this, there are other ways to express similar ideas. For instance, Eres un idiota means "You're an idiot" and Eres un tonto/a means "You're a fool", both of which are informal. If you want to use an idiomatic expression, No tienes dos dedos de frente can be used to mean "You don't have two brain cells to rub together".

Which one should you use?

You can also use the exclamation qué tonto eres to express the same sentiment, which translates to "how dumb you are".

How does it change in a sentence?

The adjective changes to the feminine form eres tan tonta if you are speaking to a woman.

How do you pronounce it?

/eɾes tan tonto/

Did you know?

  • The word tonto might be related to the Latin word for 'to shear', implying the person is as empty or hollow as a sheep's head after its wool is removed.
  • In many Spanish-speaking cultures, tonto can be used affectionately between couples or friends, similar to 'silly'. However, the addition of tan often pushes it back toward a genuine insult.
  • The phrase eres tan tonto is a 'direct' insult, but in Spain, people often use 'ser' to describe a permanent character trait, whereas using 'estar' would imply the person is just acting dumb in the moment.

Examples in context

  • Eres tan tonto que no entiendes nada.
    You're so dumb that you don't understand anything.
  • ¡No lo puedo creer, eres tan tonto!
    I can't believe it, you're so dumb!
  • Deja de hacer eso, eres tan tonto.
    Stop doing that, you're so dumb.

Example conversation

Mateo forgot his keys inside the house again.

  1. Sofía

    Mateo, ¿otra vez olvidaste las llaves?
    Mateo, did you forget the keys again?
  2. Mateo

    Sí, lo siento mucho, Sofía.
    Yes, I am very sorry, Sofia.
  3. Sofía

    ¡Eres tan tonto!
    You're so dumb!
  4. Mateo

    Lo sé, lo siento.
    I know, I'm sorry.

Sources

  • IPA marked “from spelling rules” is derived from standard Spanish spelling, where Wiktionary gives none.
  • Word origins: Wiktionary entries eres, tan, tonto, CC BY-SA 4.0.
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Chelsea Lola
Chelsea LolaHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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