The Devil's Dictionary: Barometer (n.)

An ingenious instrument which indicates what kind of weather we are having.

This reminds me of a true story about Dizzy Dean, who was broadcasting games on the West Coast when World War II broke out. Among other things, radio stations were told that they could not discuss the weather on-air, lest the Japanese invasion forces glean useful information. (Paranoid? Nah...)

Dizzy thought this was pretty stupid but naturally had to go along with it. Came the day when the game was interrupted by a rain delay, and Dizzy said to his listening audience:

"Folks, the game has been temporarily stopped for a moment. I ain't allowed to tell you why, but if you're curious, just stick your head out the window..."