The bottom drops/falls out of one's world phrase
One loses all purpose, hope and confidence of life.
When she was diagnosed with breast cancer, the bottom fell out of her world.
When he was sentenced to death, the bottom dropped out of his parents' world.
To fall into a hopeless or depressed state
1. Having got an unlucky outcome
2. In a hopeless situation
To publicly show one's feeling of sadness, guilt, or anger about something or that one is pretending to do so.
Normally, this verb in this phrase is conjugated in past simple tense.
The origin of this phrase is not clear.
A legal matter that is very easy to solve
The house owners didn't lock the doors before going out, and that's why they got broken in. This is an open and shut case.