purple
adj.— «If you combine the colors of the uniforms of the four services, you come up with the color purple. Thus officers who do joint duty, working on projects that cross service lines, are called purple-suiters.» —“Congress gives final approval to Pentagon’s reorganization” by Charles Stafford St. Petersburg Times Sept. 18, 1986. (source: Double-Tongued Dictionary)
Further reading
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...
There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...