When you’re late for something in Johannesburg, you can always say you were “held up by robots” and no one will think twice. That’s because in South Africa, a robot is a traffic light. The hosts discuss this and other terms...
wig-wag n. a rapidly alternating or strobing warning light. Also attributive. Editorial Note: Often plural, since the lights are rarely used singly. Semaphore flags have long been called “wig-wags” in the Navy, Marines, and other...