Definition of duh
1 —used to express actual or feigned ignorance or stupidity Duh, I don't know.
2 —used derisively to indicate that something just stated is all too obvious or self-evident Well, duh!
From the M-W Editors
First Known Use of duh
1943
DUH Defined for English Language Learners
duh
play
interjection
Definition of duh for English Language Learners
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—used in an angry or annoyed way to show that something just said is already known or is obvious
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—used to show or pretend that you do not know something
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