nvfanboy Share definition Flag An over-exhuberant fan of nvidia video cards , who becomes sometimes irrational. Rather than appreciate the value of the New ATI Radeon X800, the nvfanboy reared his ugly head and flamed it. nvfanboy by reave July 12, 2005 0 0 Get merch Get the nvfanboy mug. Buy Now — $32.95 See more merch