"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in
. 3.70:

Tim Wescott fired this volley in
:

So -- do you know anyone else that uses the term?

Pretty much everywhere in the deep South, you'll hear it used. And
although the Mason-Dixon line might disagree, I'd include 'deep South' to
mean just about anything south of southern Ohio on down.

I've heard it often enough in Indianapolis to know what it means. So it's not just the South.