Mudflow
Mudflow explained in an easy to understand way:

Imagine you're trying to carry a tray stacked with different items through a crowded room, and someone bumps into you. Just as you struggle to keep everything balanced and prevent it from toppling over, a mudflow occurs when the stability of rock, soil, and water is disrupted, causing it to cascade downhill. In both cases, the disturbance—whether it's a physical bump or an environmental trigger like heavy rain—breaks the precarious balance, leading to a chaotic and uncontrollable flow, much like the way your items scatter when your tray tips over.
Practice Version

Mudflow: A large flow of mud, rock, or soil mixed with water. Mudflow. In simple terms, mudflow is a fast-moving stream of liquid mud, often occurring after heavy rains, that travels down slopes or valleys.