Dictionary.com
Thesaurus.com

duh

American  
[duh, d] / dʌ, d /

interjection

  1. (used to express annoyance at banality, obviousness, or stupidity.)


duh British  
/ dɜː /

interjection

  1. slang an ironic response to a question or statement, implying that the speaker is stupid or that the reply is obvious

    how did you get in here? – through the door, duh

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of duh

An Americanism dating back to 1960–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

She looked at me like duh of course I do.

From The Wall Street Journal

They followed that up this past May with “Duh!,” their eighth EP and first to debut at #1 on the Billboard World Albums chart.

From Los Angeles Times

With 18 million views on YouTube, the punky boom-bap “Duh!” from its eponymous release barely had a chance to cool when they announced their latest album ‘‘Ex,” which they released last Friday.

From Los Angeles Times

Belgian nationals Lornoy David and Seppe Lodewijckx, both 19, Vietnamese national Duh Hung Nguyen and Kenyan Dennis Ng'ang'a, were handed similar terms after the magistrate considered their mitigation arguments.

From BBC

When they asked him via email to come on board as an executive producer, he replied with one word: “Duh.”

From Los Angeles Times