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
Knitters speak of being stranded on Sleeve Island. As the host of Sal & Al: The Woolslayers explains: Being on Sleeve Island is the feeling you get when you think you’re almost finished with a sweater because you’ve completed the...
One way to make your new business look trendy is to use two nouns separated by an ampersand, like Peach & Creature or Rainstorm & Egg or … just about any other two-word combination. A tongue-in-cheek website will generate names like...