nosedive
[ nohz-dahyv ]
/ ˈnoʊzˌdaɪv /
noun Also nose dive.
a plunge of an aircraft with the forward part pointing downward.
a sudden sharp drop or rapid decline: a time when market values were in a nosedive.
verb (used without object), nose·dived or nose·dove, nose·dived, nose·div·ing. Also nose-dive.
to go into a nosedive: a warning that prices might nosedive.