Snuffy, your examples both sound like they could work, and you're absolutely right: they aren't what I was thinking of.

"Down in/in bobblety boo" rhythm is certainly a big part of it. It might just be one of those snippets from the collective conscious of, perhaps, the whole human race, and comes to us down the ages, beaten out on skin drums in ancient Africa, in ancient Britian, in ancient Gaul, or perhaps Canada, and is hardwired into our being like the DNA of song.

Or not.