A gamer that refuses to use other video game systems other than ones manufactured by Nintendo.
Billy: "Hey guys I just downloaded all the Legend of Zelda games for my Wii."
Joe: "Gosh you're such a Nintentard, we're going to play some Modern Warfare 2!"
Billy: "Fine, I'm gunna beat the Ocarina of Time again!"
Someone who gets offended by jokes involving Nintendo. This is worse than Nintendo fanboys.
Man, Joe's a real Nintentard. He said Halo is a copy of Metroid, only more violent and XBox exclusive.