- collapse into something
- collapse into something1. Lit. to fall down into something with suddenness, as if out of energy. •
She was so tired, she collapsed into the chair.
•Juan collapsed into a chair and fell fast asleep.
2. Fig. [for someone] to fall into a particular kind of despair. •The poor man collapsed into a deep depression.
•Scott collapsed into his own personal brand of grieving.
Dictionary of American idioms. 2013.