Norbert the Nutjob is the chief of the Hysteric tribe. He is the son of Bigjob and a genius inventor. He is an arch enemy of Hiccup and owns a double headed axe that decides the fate of his prisoners. Norbert has a great dislike towards Camicazi too, ever since she had a swordfight with him and knocked him out with his own potato, and has tried twice to kill her.
Norbert first appears as the one Hysteric that Hiccup shot an arrow at. Hiccup later feeds his papa to the Squealers, steals the holy Potato that cured Fishlegs, and burns the Hysteric Hall to ashes. It is also accounted in How to Ride a Dragon's Storm that Hiccup also steals the ticking-thing (Which is surprisingly a compass and a watch) from the casing that held the Potato.Camicazi, and Fishlegs No-Name, and is about to exact his revenge upon Hiccup when he realizes he in fact cannot read the ticking-thing, and changes his mind. Throughout the story, he is anxious to kill Hiccup when he reaches America, and when he at last sees land, he and Hiccup start a huge fight that rouses the other Hysterics onboard. The Leviathorgan also causes much mayhem, destroying the ship and devouring all of the hapless Hysterics. Norbert and Hiccup face off on the mast of the sinking ship, but just as Norbert raises his axe to kill the helpless Hiccup, a bolt of lightning from the raging storm high above strikes him with ten thousand volts of electricity. The blast is so powerful that the whole ship, including the Leviathorgan that tried to eat it, is destroyed, and Norbert the Nutjob plummets straight into the see and is weighed down to the depths of the ocean by the ruined Axe of Doom.
In the last book, Norbert is revealed to have survived, and has hidden himself among the Wanderers. He also has the Dragonmark, hinting he sided with Hiccup in the war, despite wanting to kill him.
- Norbert the Nutjob might have been the inspiration of Dagur the Deranged, one of Hiccup's former enemies in the TV series.