DF
n.— «With all the name-calling that has gone on between recumbent riders and regular cyclists, it’s clear the recumbents have better nicknames.… The regular bike cyclists, on the other hand, call themselves “DF” or “Diamond Frame” cyclists. Or sometimes “Uprights.”» —“Bents and Nonbents” by Jeff Kunerth Orlando Sentinel (Florida) Dec. 10, 2007. (source: Double-Tongued Dictionary)
Further reading
A magnificent new book celebrates the richness and diversity of 450 years of written and spoken English in what is now the United States. It’s called The People’s Tongue, and it’s a sumptuous collection of essays, letters, poems...
How do you transform ancient Chinese script for use in the modern age? English uses a keyboard with just 26 letters, but the first Chinese typewriter looked like a small table under a huge disk with more than 4,000 characters. A new book chronicles...