paper airplane
n.— «Aviation has a long history of what people call “paper airplanes”—some guy comes along who’s going to build a new plane that goes 1,000 miles an hour and only costs $200 to fly, and he raises money and is never heard from again.» —“Founder of firm creating ‘cheap’ jet to speak at DWC” by Dave Brooks Nashua Telegraph (N.H.) Apr. 6, 2005. (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...