It was actually super easy

If I were DM, congrats! You're hidden backstory is that you were one of the most depraved rodeo clowns to ever have existed. You were patient zero of a necromantic crotch-rot epidemic plaguing your birth-nation to this very day. You traded your memories for the cure. No one recognizes you because you're not wearing your signature make-up and are wearing more than just chaps and a crazed grin.