I came across this thread because I was looking for someone who had recoreded the song. Turns out I already have the CD, somewhere. I like the phrase because it has that old, weird, American, snake-handling, pentecostal feel to it.

Anyway, what I heard is that it's pretty much what Barbara said first, "Ain't gonn be in the second 'bama long" as in "Ain't gonna be in the Second Alabama Infantry long." I'd be interested in other opinions.