unk-unk
n.— «Aerospace-men have come down with a severe case of what they call the “unk-unks”—the “unknown unknowns.”» —“Aerospace: End of the Gravy Years” Time Mar. 9, 1970. (source: Double-Tongued Dictionary)
Further reading
Book recommendations and the art of apology. Martha and Grant share some good reads, including an opinionated romp through English grammar, a Spanish-language adventure novel, an account of 19th-century dictionary wars, and a gorgeously illustrated...
Book recommendations, including a collection of short stories inspired by dictionaries, and a techno-thriller for teens. Or, how about novels with an upbeat message? Publishers call this genre up lit. Plus, a clergyman ponders an arresting phrase in...