blurter
n.— «That Elton John and Kiki Dee could have come about as a result of a Gareth Gates (an innocent mistake) or a blurter (a bad judgment call).» —“Revealed: how to chat up a senior clerk” by Nina Goswami TheLawyer.com July 13, 2007. (source: Double-Tongued Dictionary)
Further reading
Ian in Jacksonville, Florida, wonders about why musicians use the word clam to mean “a mistake” or “an egregious musical error,” as in There are a lot of clams in there or We need to practice where the clams are regarding a...
Quiz Guy John Chaneski has crafted a quiz involving a polysyllabic word followed by another word that repeats the last of those syllables twice. For example, suppose the clue is: “When playing a simple game with a toddler, it’s a real...