This commonly refers to an all female office in corporate America, located in the mid-west (I.E. Dallas). They distinguish themselves by giggling during conference calls and sending smiley faces in emails and IMs. Usually girls with names like Kristi, Melody, Destiny and Jennie. They tend to act busy when everybody know they have nothing to do.
Remote Office in Charlotte: Hey Kristi, did you get that loan into closing.
Dallas Sorority Girl: HEHEHEHEHEHE. :) Yes, but it was really hard. I had to order VOMs, VOEs, Payoffs. It took all day.
Remote Office in Charlotte: Well, Kristi. Thats your job. Its why we pay you.
Dallas Sorority Girl: HEHEHEHEHEHEHE :) :) that right sorry.