A large falling movement of loose rocks and soil is called a rockfall or debris flow.

Here's a breakdown:

* Rockfall: This specifically refers to a mass of rock falling freely down a slope.

* Debris flow: This is a broader term that includes a mixture of rock, soil, and water flowing rapidly down a slope.

Both rockfalls and debris flows can be very destructive, causing damage to property and posing a risk to human life.