>>10947014Brainlet is a word, it's been in use since the 1800s at least:
1858, Henry Mayhew, The Upper Rhine: The Scenery of Its Banks and the Manners of Its People:
"the railway : an invention which is so thoroughly English that, even supposing it likely to have occurred to any slow Prussian brainlet, it would still have been impossible to have found any other nation (excepting perhaps America) with spirit or capital sufficient to have afforded the plan a trial."
1859, Tait's Edinburgh Magazine, page 522:
"Still, we have in this country Whig writers—that is, party Whig writers, of the regular party guage, assuring the other little brainlets who believe their writings, that Ruskin is an author of equivalent genius to Jeremy Taylor's—a great man—an intellectual pinnacle—merely because he puts his hand to madnesses, because he abuses Protestantism, and thinks that Christians should not mind their own business, but all other people's businesses— exactly what a Whig of the latter-day school does in office, devising conspiracy bills for French people and sending advice to Germans— which they don't want, and don't take well;"
1905, Booth Tarkington, The conquest of Canaan: a novel, page 254:
"I think he told Claudine the same thing when they met, and convinced the tiny brainlet of his sincerity."
