Have you ever played in the sand at the beach or in a sandbox? Do you remember how sometimes you would make a big pile of sand and then try to dig a tunnel through it or make a hole in it? Now imagine that the sand pile is really, really tall and heavy.
Sometimes, when the sand pile gets too heavy or too steep, it can't hold its shape anymore and starts to slide or collapse. This is called a slump.
In geology, a slump is when a big pile of rocks, dirt, and soil on a hillside or cliff starts to slide down. The force of gravity pulls everything down and it can create a big mess at the bottom of the hill.
Slumps can happen for a few different reasons like if it has rained really hard and the ground is too wet, or if there is an earthquake that shakes things up. Slumps can also happen if humans dig too much and make the hillside weaker.
Slumps can be dangerous and cause damage to buildings, roads, and other structures. It's important to be safe and avoid building or living in areas that are prone to slumps.