diamond
n.— «First sergeants are required to be at least a master sergeant to wear a diamond on their sleeve, which is why they are sometimes referred to as “diamonds.” However, technical sergeants may be selected to hold the additional-duty first sergeant position, which involves many of the same responsibilities as a “diamond.”» —“‘Diamonds’ help raise Edwards’ bar” by Mike Young Edwards Air Force Base (California) Nov. 30, 2007. (source: Double-Tongued Dictionary)
Further reading
When there’s no evening meal planned at home, what do you call that scramble to cobble together your own dinner? Some people apply acronyms like YOYO — “you’re on your own” — or CORN, for “Clean Out your Refrigerator...
You know that Yogi Berra quote about how Nobody ever comes here; it’s too crowded? Actually, the first person to use this was actress Suzanne Ridgeway, who appeared in several movies with The Three Stooges. A new book shows that many well...