Brainiac
WordNet
noun
(1) Someone who has exceptional intellectual ability and originality
"Mozart was a child genius"
"He's smart but he's no Einstein"
WiktionaryText
Etymology
coined in the Superman comic book. The term first appeared in Action Comics #438 in July, 1958.
Noun
- a very intelligent and usually studious, erudite person, can be derogatory http://www.urbandictionary.com/define.php?term=Brainiac