While you're last guess might be possible, I think it's more to thae Jubal Jew phrase than that.

Also, the jubal jew phrase in Talley's collection that I was referring to was included in the chorus of the song "Gooseberry wine". Thanks for pointing out that other song from Talley's collection.

My final comment on this subject is that I think that the similarly sounding names, words and phrases "Juba", Jubal" , Jubilant, Jubilee, and also juberju (and even "ju ju") all blended together in some folks' minds to refer to a joyous uptempo dance movement that was part of the Juba dance and that was known as the "Jubal Jew".

Best wishes,

-Azizi (posting as a guest to see if it takes)