Nerdinitis Share definition Flag A condition affecting millions of people where individuals experience severe nerd-like symptoms. Steve Urkel is a classic case of nerdinitis. Modern interpretation can be seen from characters in the t.v. series The Big Bang Theory. Nerdinitis by Harold McPhin November 3, 2010 0 0 Get merch Get the Nerdinitis mug. Buy Now — $32.95 See more merch