the bottom drops out

Meaning

1. the bottom drops / falls out (of sth)

   people stop buying or using the products of a particular industry

   The bottom has fallen out of the travel market.

From the same entry

• at bottom
• be at the bottom of
• bottoms up
• get to the bottom of
• at the top of the heap
• from the heart
• bottom of the pile
• race to the bottom
• scrape the barrel
• from top to bottom
• touch bottom
• you can bet your life bottom dollar …)