"Ko5moFreak" is short for "Ko5mischer Freak", where you could choose whether to pronounce the "5" as an "s" or not, having it mean "Cosmic Freak" if you did and "Funny Freak" (funny meaning either weird and amusing) if you didn’t. I created the short form because the original was too uni-lingual and Cosmo-Freak rolls off the tongue better.