a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a gadget; dingus; thingumbob.
a scrap or morsel of food left at a meal.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
"very smart person," 1980s U.S. slang, from brain + 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.