duh

interjection \ˈdə, usually with prolonged ə\

—used in an angry or annoyed way to show that something just said is already known or is obvious

—used to show or pretend that you do not know something

Full Definition of DUH

—used to express actual or feigned ignorance or stupidity

—used derisively to indicate that something just stated is all too obvious or self-evident

See duh defined for English-language learners

1966

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