nanny
n.— «I remember the first time I saw a Jamaican $100 bill. It was at home in St. Thomas and an “uncle’ was visiting from the United States.…I do not know when the $100 became a “bills,” as it is commonly referred to (it has been more recently referred to as a “dollar,” no doubt as its purchasing power falls). Of course, the $500 note is known as a “Nanny.”» —“What can a ‘bills’ do?” by Mel Cooke Jamaica Gleaner (Kingston) May 31, 2007. (source: Double-Tongued Dictionary)
Further reading
The emotional appeal of handwriting and the emotional reveal of animal phrases. Should children be taught cursive writing in school, or is their time better spent studying other things? A handwritten note and a typed one may use the very same words...
Shaun Usher has collected many marvelous epistles in Letters of Note: Correspondence Deserving of a Wider Audience (Bookshop|Amazon). One of them, from E. B. White, is a thoughtful letter of encouragement urging the reader to “wind the clock...