Examples from the Web for brainiac
Except for maybe his brainiac wife… but she could do better anyway.All Your Internet Boyfriends Are Taken: Gosling, Cumberbatch, and now Joseph Gordon-Levitt|Melissa Leon|January 3, 2015|DAILY BEAST
“Scientists know now that being a brainiac is not so much about IQ but about executive function,” Golinkoff asserts.
British Dictionary definitions for brainiac
Word Origin for brainiac
Word Origin and History for brainiac
"very smart person," 1982, U.S. slang, from brain (n.) + ending from ENIAC, etc. Brainiac also was the name of a comic book villain in the Superman series and a do-it-yourself computer building kit, both from the late 1950s, and the word may bear traces of either or both of these.