ˌdrop dead ˈdate BrE AmE noun [countable usually singular] American English informal
a date by which you must have completed something, because after this date it is no longer worth doing
ˌdrop dead ˈdate BrE AmE noun [countable usually singular] American English informal
a date by which you must have completed something, because after this date it is no longer worth doing
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012