Top Definition
A social-professional fraternity consisting of eight chapters, some of which have Little Sister affiliated with the organization. DTS has awesome theme parties, and the University of Minnesota Chapter is well noted for the popular Beach Party held every spring, with a basement full of sand.
Freshman: Hey man, did you go to Beach Party?
Delta Theta Sigma Fraternity member: Duh, I hosted the damn thing.
Freshman: Great! Can you tell me which girls I hooked up with?
by DTS awesome February 13, 2011
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