Kacky traces her broadcast beginnings back to Clarksdale, working with the late inimitable Early Wright. "Kadoo's" could have been a "Wright-ism" which Kacky brought with her to the 'KNO audio radience. Not a confirmed story, but a possibility.
I thoroughly enjoy hearing old tapes of Early Wright (he's unfortunately not making any new ones now), and would treasure hearing someone who is able to be that "real" on the radio. I would also admit that at the time he was doing radio I would have been too thick to "get" it, and not appreciated what I was hearing for what it was. In the same way, way back when I got my blues from the Allman Brothers, Clapton and the like; nowadays I listen to the blues stuff on WEVL and find the most enjoyment in songs which sound like they were played on rubber-band guitar strings, with vocals I can't quite make out.