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
Do you refer to your dog or cat as “somebody”? As in: When you love somebody that much, you don’t mind if they slobber. In other words, is your pet a somebody or a something? Also, for centuries, there was little consistency in the...
Sure, there’s winter, spring, summer, and fall. But the seasons in between have even more poetic names. In Alaska, greenup describes a sudden, dramatic burst of green after a long, dark winter. And there are many, many terms for a cold snap...