Wiktionary
bottom falls out
phr. (context idiomatic English) Said about a collapse
Usage examples of "bottom falls out".
If the bottom falls out of the market, I can do some good for myself.
Like the 'there's no top to this market' shit that you get before the bottom falls out.
Suddenly the bottom falls out of the market for Whoosisite, and before you know it you can't give the stuff away and it's being carted out to Delambre by the hundred-tonne bucketload.
Our popularity declines by an enormous percentage, and the bottom falls out of the hot-shot market.
He is up to making a very large fortune for himself before the bottom falls out here on Jubal.