Definition of brainiac in English:
nounNorth American informal
An exceptionally intelligent person.
- Can you please tell the brainiacs and intellectuals that not everyone is a walking dictionary?
- I'll tell you what, you goddamn egghead brainiacs at NASA: I don't want a space elevator.
- Here's what the brainiacs on the editorial board of The World's Greatest Newspaper can't understand.
Definition of brainiac in:
- British & World English dictionary
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