Fall apart

If an organization, system, or agreement falls apart, it fails or stops working effectively.

Some Excerpts: 

From TV shows, movies and novels

In Treatment
Dianne Wiest(Gina) and Gabriel Byrne(Paul) used the phrasal verb “fall apart” in the fifth episode of a popular TV show “In Treatment” which is about the patient-therapist relationship.

Tags: Gabriel Byrne, In Treatment