the roof caves in
the roof caves in
The situation collapses; everything goes wrong. Typically used in the past tense. I was living paycheck to paycheck and getting by OK, but then the roof caved in. I lost my job, and then my car and my house.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
the roof falls in
a disaster occurs; everything goes wrong.Farlex Partner Idioms Dictionary © Farlex 2017