the roof caves in

(redirected from roof fell 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.
See also: cave, roof

the roof falls in

a disaster occurs; everything goes wrong.
See also: fall, roof