by Krazy Boi December 25, 2018

Sound used to imitate a mentally retarded person as an answer to an obvious remark or question. The person using "duh" is thereby sarcastically indicating that he/she is not retarded and the forgoing remark or question is obvious to him/her.
by martaze August 28, 2008

A basic unit of measurement of human stupidity. One "duh" is a single unit of stupidity, for example, misplacing your keys would be approximately one duh. Due to the large amounts of stupidity present in the world, more practical units are megaduhs(10^6) or gigaduhs(10^9). Still larger units such as exaduhs(10^18) or yottaduhs(10^24) are more appropriate for measuring stupidity on a global level.
by kpatz January 23, 2009

Friend: I took a trip to nostalgia land
D-bag: Look on the bright side, it means more people can enjoy old anime now.
Friend: Uhh, why would I look on the bright side even though my comment never implied something negative.
D-bag: Because you need to experience the dark side to fully value the bright side.. DUH!!!
Friend: Uhh, I still don't see how any of that is relevant to my comment, you make zero sense.
D-bag: No, it means you have no common sense, DUH!!! Go back to school retard.
D-bag: Look on the bright side, it means more people can enjoy old anime now.
Friend: Uhh, why would I look on the bright side even though my comment never implied something negative.
D-bag: Because you need to experience the dark side to fully value the bright side.. DUH!!!
Friend: Uhh, I still don't see how any of that is relevant to my comment, you make zero sense.
D-bag: No, it means you have no common sense, DUH!!! Go back to school retard.
by John Rackham December 5, 2021

by MzQ July 21, 2003

by dj gs68 October 23, 2003

The sound a retard makes.
1. Used to indicate that something is so obvious that even a retard could figure it out.
2. Shorthand for, “How did I not think of that? I am such an idiot!”
1. Used to indicate that something is so obvious that even a retard could figure it out.
2. Shorthand for, “How did I not think of that? I am such an idiot!”
Duh! What was I thinking?
by Maldoven July 7, 2011
