fall out of something—
1. drop out of smth.:
- Suddenly, something fell out of the Bible. What he saw was an old leaf that had been pressed in between the pages.
2. (used figuratively in phrases such as “fall out of love,” “fall out of use,” etc.):
- It is interesting how words fall out of favor or dramatically change in meaning over time.
fall outside something—be beyond the scope of one’s responsibility, interests, etc.:
- What they are asking me to do falls outside my technical skill set.
Cf.: fall within something—be part of one’s responsibility, interests, etc.:
- I am open for almost any type of work that falls within my expertise.