bottom fell out

the bottom fell out of (something)

The value of something reached a lower point or collapsed entirely. Once the bottom fell out of the housing market, I knew I'd be stuck with a bad investment—or sell the house for a significant loss.
See also: bottom, fell, of, out
Farlex Dictionary of Idioms.

bottom fell out (of something)

Fig. a much lower limit or level of something was reached. The bottom fell out of the market and I lost a lot of money.
See also: bottom, fell, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • bottom out
  • stuck
  • in the event
  • in the event that
  • get stuck in
  • stick in
  • far cry, a
  • feel (something) with (something)
  • feel with
  • just in case