rat line
n.— «The British troops will be supported by US helicopters and unmanned reconnaissance drones which will scan the desert looking for tracks indicating “rat lines”—military jargon for the routes used by the resistance to transport fighters, arms and money.» —“Shells Land Near Black Watch Base” by Richard Lloyd Parry in Basra, Iraq Scotsman (Scotland) Oct. 31, 2004. (source: Double-Tongued Dictionary)
Further reading
Language is always evolving, and that’s also true for American Sign Language. A century ago, the sign for “telephone” was one fist below your mouth and the other at your ear, as if you’re holding an old-fashioned candlestick...
When a teenager went a week without talking as part of a school project, he noticed a surprising side effect: Instead of rehearsing a response to what other people were saying to him, he was focused on listening — and feeling smarter as a result...