red on red
adj.— «“Red on red,” he said, using a military term for enemy-on-enemy fire.» —“Marines See Signs Iraq Rebels Are Battling Foreign Fighters” by Sabrina Tavernise New York Times June 21, 2005. (source: Double-Tongued Dictionary)
Further reading
Sean in Oneonta, New York, says that when he was growing up in New Jersey, his family would pile in the car and set off on a surprise adventure, whether a short distance or long, and the kids would be told only that they were going on Buxtehude...
Asthenosphere, a geologist’s term for the molten layer beneath the earth’s crust, sparks a journey that stretches all the way from ancient Greece to the author of Uncle Tom’s Cabin. Plus: What the heck is a dogberg? It’s when...