drop-dead deadline
n.— «More than 7,000 Americans already have fled the area and the U.S. was prepared to take another 3,000 out this weekend in what has been referred to as “drop-dead deadline” to leave the area.» —“Israeli troops raid village in Lebanon” by Jennifer Walters MarketWatch July 22, 2006. (source: Double-Tongued Dictionary)
Further reading
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...
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...