der
Der (interjection) means used sarcastically to point out that something just said is obvious or was already known. Example: “The sun rises in the east." "Der, everyone knows that!" laughed his sister.”
How to use der
Learner’s notesIn plain EnglishA sarcastic "duh" — said when something is painfully obvious or someone says something silly.
Very informal slang, mainly spoken.
Word forms
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"The sun rises in the east." "_____, everyone knows that!" laughed his sister.
Etymology
An imitative sound, mimicking a slow or dim-witted response; related in spirit to "duh" and "dur."
Synonyms
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