frindle
n.— «The award-winning book’s star, in defiance of his dictionary-worshipping teacher, invents and spreads his own word for the common pen: Frindle.» —“In Our Schools: Master one language, invent another” by Howard Buck The Columbian (Clark County, Wash.) Nov. 22, 2004. (source: Double-Tongued Dictionary)
Further reading
The Very Hungry Caterpillar (Bookshop|Amazon) had an earlier title: A Week with Willie the Worm. This is part of a complete episode. Transcript of “The Very Hungry Caterpillar’s First Title” Here’s another book title that didn’t make it, A Week with...
The Merriam-Webster.com dictionary now includes an entry for TL;DR, also rendered as TLDR. It’s a speedy way of dismissing overlong text or introducing a shortened version of something. This useful locution also inspired AI;DR, short for AI;didn’t...