A dramatic fall refers to a sudden and significant decline or drop in something, often used metaphorically to describe an unexpected or severe change. Full definition
The most dramatic fall in the price of renewables has been seen in wind power. (newscientist.com)
That would increase the risk of a sudden and dramatic fall in stocks, quite possibly setting off a negative global chain reaction. (blog.evergreengavekal.com)
His demise, coupled with the #MeToo and #TimesUp movements, resulted in multiple stories of abuse, and many dramatic falls from grace. (independent.ie)