Those of us who grew up in the Southeast in the late 60s and early 70s remember this as being one of Gordon Solie’s favorite expressions. I found this article from 1967 which uses the term–and contextually, it seems that the writer assumes you already know what it means.
I don’t think that Solie probably coined the term itself, although he might have had a hand in elevating its familiarity. However,I haven’t found a lot online for this term that doesn’t point back to Solie.
Anyone with any older citations?