unsub
n.— «Button Up and four other “unsubs”—FBI shorthand for “unknown subjects”—together are thought to be responsible for more than 30 robberies, nearly one-third of the bank robberies committed in Washington since January.» —“Button Up Bandit, others hitting banks at rapid pace” by Sara Jean Green Seattle Times (Washington) May 12, 2006. (source: Double-Tongued Dictionary)
Further reading
If you take up texting and social media late in life, there’s a lot to learn! A twenty-something wants advice getting her dad up to speed on memes, Instagram, and animated images. Plus, when you’re on a long road trip, what do you call...
Do you refer to your dog or cat as “somebody”? As in: When you love somebody that much, you don’t mind if they slobber. In other words, is your pet a somebody or a something? Also, for centuries, there was little consistency in the...