Durka Dur is a sentence coming from a few episodes from the cartoon South Park.
In some episodes there are a group of "rednecks" who got their job taken, and yell randomly "They took our jobs!!".
But every next person to say this sentence starts saying it more and more with a "redneck" accent, and at the end the sentence sounds like "Durka dur!!"

This gig returns randomly, when at a certain episode they rephrase "They took our jobs!!" to "They took his dog!!" or "They broke his jaw!!", but still always ends with "Durka dur!!"
Redneck 1: "They took our jobs!!"
Redneck 2: "They took er jerbs!!"
Redneck 3: "Der took er jerbs!!"
Redneck 4: "Der ter durr!!"
Redneck 5: "Durka Dur!!"
by SuzukiSwiftSport November 29, 2009
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