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
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