red mushroom
n.— «A preliminary investigation also found that the train’s braking system was not defective and that the operator did not press the “red mushroom”—Muni parlance for the bright red button on the operator’s console that activates an emergency brake. The light-rail vehicles are operated with hand controls.» —“Muni train likely speeding before crash” by Rachel Gordon San Francisco Chronicle (California) June 17, 2008. (source: Double-Tongued Dictionary)
Further reading
Unwrap the name of a candy bar, and you just might find a story inside. For instance, one chewy treat found in many a checkout lane is named after a family’s beloved horse. And: 50 years ago in the United States, some Latino elementary...
If you speak both German and Spanish, you may find yourself reaching for a German word instead of a Spanish one, and vice versa. This puzzling experience is so common among polyglots that linguists have a name for it. • The best writers create...