An exclamation meaning "Oh, that fucking sucks!" Originally derived from "that suuuuuuuucks" - a term used at Edina High School in 2002. But later it morphed into the elusive dut. Often, the dut is complete with a hand motion that includes pointing one arm outward while hitting the inner elbow of said arm with the other hand. A dut can be used on yourself (self-dut), others (dut), or a large group of people (duts all around).
Mark: Yo Niko, I totally got blue-balled by this chick.
Niko: That's a big dut!
Mark: Yeah, total self-dut.