verbal gratuity
n.— «What do all servers fear? It’s the dreaded “verbal gratuity,” by which customers hope to balance a lousy tip with effusive praise.» —“Here’s taste of often unsavory business of waiting tables” by Howard Seftel Arizona Republic (Phoenix) Oct. 19, 2005. (source: Double-Tongued Dictionary)
Further reading
What kind of book do people ask for most often in prison? Romance novels? No. The Bible? No. The most requested books by far are … dictionaries! A number of volunteer organizations gather and distribute used dictionaries to help inmates with...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...