Lord Nibbler is a fictional character from the animated television series Futurama. He is voiced by Frank Welker, who provides not only the speaking lines but also the various noises he makes when not speaking English. During most of the series Nibbler masquerades as an innocent, cute and unintelligent pet.
In very rare circumstances he may break his undercover identity and suddenly be discovered to be super intelligent, equipped with unique technology and strange natural abilities, which he uses as part of his secret mission to preserve the existence of the entire universe, though in most instances everyone else's memories of the incidents and his true nature are erased. The actual fate of Nibbler is unknown, as he was not on the Planet Express ship at the end of Into The Wild Green Yonder, it is possible he was left in the Planet Express building, much like Dwight and Cubert. This character's true name is not revealed, because "in the time it would take to pronounce one letter of [his] true name, a trillion cosmoses would flare into existence and sink into eternal night".
Leela took him for a pet when she found him on the soon-to-be-destroyed planet Vergon 6 in the episode "Love's Labours Lost in Space" and named him "Nibbler", just before observing his ability to rapidly consume animals far larger than himself. When with other Nibblonians, he is referred to as "Lord Nibbler", though this name is only used for the sake of nearby humans.