I'll start....
Mine started my freshman year in college. My roommates (all four of us were freshman -- can you imagine

Whenever they introduced me to somebody, they intoduced me as Racket (my roommates were a little "different"). I always got funny looks from people when this happened. Sometimes I just said, "Hi, my name's is actually..." After 3 years (I stopped school after that) it kinda spread and stuck with me.
So anyway, I just took "racket" and threw a "boy" on the end of it and got "racketboy". Simple enough, huh?