When a person urinates all over another person. It can often lead to impregnation, although that makes no sense. When one carries out a Golden Victory, he/she must hold their arms up in the air and scream, hence "victory".
You probably can where the "golden" comes from... but if you can't... the piss.
" Guy 1: Dude im gonna piss all over your mom, I know how much you wanted a brother.
Guy 2: Golden Victory ! Awww yeah!"