The ones of Floyd are pretty lame. Most names that people make up to make fun of fighters are pretty lame, but there are some exceptions. Ike Ibeatahoochie Shitali Quitschko Cheato Triniwraps Vivian Harris
Anphonio Margacheato AKA "Fist of Plaster" EDIT -- o this is about Floyd. I don't think there are any real good ones for him.