2)An expression showing that something someone said is obvious
Jamie: Well, dur! She sent him 3 love letters!
Jackie: What's the capital of Wyoming?
Doug: Jackie, we just learned that in class today. You can figure it out.
B)Someone that shows you how much more stupid people really are, than what you thought they were.
C)Another way of calling someone a dumb shit or saying no shit.
Darci(Me): What a dur...