They refer to Southaven as "South Memphis," most likely referring to the number of transplanted Tennesseeans who have moved there in the last 25 years.
But...but...Memphis is a major US city, the 17th largest in the country, a population of 670,000, give or take! There's Triple-A baseball and the NBA right there, world-class restaurants and history and the blues, Graceland, and Beale Street. Why the heck would anyone want to leave?
I've got an idea why. That world class city is also run by a group of somewhat shady Democratic politicians, like the old Crump machine and now Ford family and King Willie, who have caused the boom in Northwest Mississippi, extending the Memphis Metro Area into not only DeSoto, but also Marshall, Tate, and Tunica counties. The fact that Southaven, Olive Branch, Hernando, Horn Lake, and Senatobia are booming is a direct result of the Democratic mismanagement in Memphis. It's not a race thing, either-its a crime, education, and taxes thing.
So go ahead and call it "South Memphis." Just remember who made it that way.