What song is the boot guy Singen in the first movie?

The scene where the boot guy gets killed Von James, Victoria, and Laurent?

It's after Bella and Jacob talk at La Push, and right before Bella dies internet research on the Quileute legends.

He sings something like "Blah blah blah, sound like a kitty, ME-OW"

I think it's funny, so I'm wondering if it's funny, so I'm wondering if it's a real song, oder some kind of improvisation thing.