Since the 1950’s, the term think tank has meant “a research institute.” But even earlier than that, going as far back as the 1880’s, think tank referred “a person’s mind.” Another slang term for one’s mind is thought box. This is part of a complete episode.
More from this show
According to Gobsmacked: The British Invasion of American English (Bookshop|Amazon) by Ben Yagoda, the word smarmy, meaning “unctuous” or “ingratiating,” may come from a 19th-century magazine contest, in which readers sent in...
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...