slump

nouns

a noticeable deterioration in performance or quality
"the team went into a slump"; "a gradual slack in output"; "a drop-off in attendance"; "a falloff in quality"
drop-off, falling off, falloff, slack, slump
a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
depression, economic crisis, slump

verbs

assume a drooping posture or carriage
slouch, slump
fall or sink heavily
"He slumped onto the couch"; "My spirits sank"
sink, slide down, slump
fall heavily or suddenly; decline markedly
"The real estate market fell off"
fall off, sink, slump
go down in value
"the stock market corrected"; "prices slumped"
correct, decline, slump