nerfus Share definition Flag a combination of nerd and nerf, the word defines a person who is both a nerd and a jock. The "us" suffix is latin. That hunky football player plays computer games for two hours a day?! What a nerfus. nerfus by FastrunnerNY January 2, 2009 0 0 Get merch Get the nerfus mug. Buy Now — $32.95 See more merch