A gay male of Asian descent, usually Filipino. Also refers to writers of battledome guides for Neopets and darkztar or someone who sells weapons for cash.
Girl: Omg thanks for your latest battle guide!! You are such a richardnub!!
Boy 1: I wanna be popular. How do I become popular????
Boy 2: Stop being a fighter mcwarrior and start being a richardnub, why don't ya?