jump-out
n.— «When the unmarked units approached the street corner, the crowd of individuals immediately began dispersing upon observing the presence of the “jump outs.”» —“Intuitive Policing: Emotional/Rational Decision Making in Law Enforcement” by Anthony J. Pinizzotto, Edward F. Davis, Charles E. Miller American Psychological Association May 24, 2004. (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...