We don’t have one. That’s the beauty of it. The song is a patchwork quilt of ancient fears, political jokes, and Viking brags.
Maybe it’s about a bridge. Maybe it’s about a queen. Maybe it’s about a very unlucky lady in the foundation. We’ll never know for sure.
But the next time you hum it while washing dishes, remember: you’re singing a thousand-year-old saga about infrastructure. And that’s weirdly wonderful.