http://www.sherdog.com/fighter/Dioginis-Souza-122235 Here is Dioginis "Overeem" Souza a 155lb fighter. Looks like Overeem without the juice aswell. There is being a fan of a fighter and then there is nutthuggery to this level.
Nick names are not normally picked but given, especially in the MMA world. I knew I recognized him somewhere, he got finished at EFN 50.