Sweet Sweetback has a song that is proportedly pretty badass :) But I was referencing a theme song for the professional wrestler known as "The Undertaker". It was during a goofy period where the powers that be decided, "hey, let's not license real songs to be wrestler theme songs, let's have our in-house band write songs! WHAT COULD GO WRONG?"
Schluppy Mi Puppy
I forgot that entrance music between American Badass ‘Taker and when he returned as the Quaker Oats guy. I never looked at a box of oatmeal the same ever since.