How to Say “You’re so Dumb” in German

du bist so dumm
The German phrase for "you're so dumb" is du bist so dumm.
This phrase is used to tell someone that they lack intelligence. The word dumm is a very common and blunt insult in German, similar to the English usage.

Is it said differently in some regions?

In Switzerland, Du bisch so dumm. means "You're so dumb.". In Austria, Du bist so deppert. is used to express someone being dumb, while in Bavaria, Du bist echt deppert. means "You're really stupid."

How does it change in a sentence?

The phrase du bist so dumm uses the singular informal du (you), which is appropriate for friends or peers but would be considered rude if used with a stranger or superior. If you are addressing a group of people or a single person formally, you would use Sie sind so dumm instead of du bist so dumm. To tell a group of people they are dumb, use the plural informal form ihr seid so dumm.

Did you know?

  • The word dumm is actually a distant cousin of the English word 'dumb'. While 'dumb' in English often means unable to speak, the German version refers strictly to a lack of intelligence.
  • While dumm is blunt, Germans often use the phrase Hä? when they think someone has said something stupid, which functions as a questioning 'What?'
  • In German, calling someone dumm can be softened by using the word bisschen to say they are a 'little' bit dumb, but this is often used sarcastically.

Examples in context

  • Du bist so dumm. Was hast du dir dabei gedacht?
    You're so dumb. What were you thinking?
  • Du bist echt deppert. Wie kann man nur so blöd sein?
    You're really stupid. How can someone be so dumb?
  • Du bist so dumm!
    You're so dumb!

Example conversation

Two siblings are arguing while playing a video game.

  1. Hannah

    Du bist so dumm, Maximilian!
    You're so dumb, Maximilian!
  2. Maximilian

    Das stimmt nicht, Hannah.
    That is not true, Hannah.
  3. Hannah

    Du hast den Fehler gemacht.
    You made the mistake.
  4. Maximilian

    Es war nur ein Versehen.
    It was only a slip.

Sources

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Sam Warren
Sam WarrenHelp 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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