Original title for this tune was "Spunk" until it became clear that in British English, the word "spunk" was not just a double entendre for "male ejaculate," it was a SINGLE entendre. That's all it means to those filthy-minded Brits - the same folks who still call a cat "pussy."
So "Swagger" then.
This melody has been stuck in my head for years. Glad other folks got to hear it besides me