A sudden, swift drop or plunge: Stock prices took a nosedive. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "nosedive" in a sentence
"Ever since the "Flash Crash" in May of 2010 - when the market took an unprecedented short-term nosedive due to computer-driven trading - many investors had wondered if the growing popularity of exchange-traded funds was somehow driving the market through its manic periods."
"The nosedive could be a sign that it lacks the shelf life that made Baron Cohen's "Borat" a"
"Possum, that is the first I have heard of the "nosedive" concept."