Derr

[Justin Bieber]

another word for duh. when someone says something idiotic, and you want to say duh in a much more sophisticated way, you should say derr

[Couch Potatoe]

A word used to infer the unintelligence of an individual, item or anything else when mocking them

[PussyCat]

pronounced: Duhr, or durr. a derr is a person with special needs, or a person who is acting idiotic.

[Sarah]

a stupid or weird and socially awkward person

[stupid] [dumb] [weirdo] [socially awkward] [creeper]

[PussyCat]

one who has strength, wisdom, and great physiqueness.

[Jason Yan]

1/ A sound generally attributed to those with mental afflictions making more articulate use of oral communication impossible.
2/ A sound used to mock said people.

[Little_Girl]

a person who is acting [stupid] or being a dumbass. You can also use it instead of calling somebody [stupid], a dumbass, bitch, etc.

[Zipporah Schumaker]

(n) /dur/ - term initially made to be used as a remark to something stupid, but now a widespread phenomenom that is now more overplayed than yeah by usher.

[Sonia]

same as duh