brainiac

noun

1. (derogatory, slang, sometimes)A very intelligent and usually studious, erudite person.

   “With all the brainiacs in the world ... you'd think somebody would come up with a sunblock for ice cream.”

   “With nearly 900,000 Twitter followers, Popova is a member of a rare pantheon of “influencers” for the brainiac crowd. Miraculously, she makes a living writing a blog about science, literature, philosophy, feminism and whatever else takes her voracious and generous fancy.”