There are a few ways to slow down on a unicycle. The first way is to use the brakes. If your unicycle has brakes, you can apply them to slow down. The second way is to pedaling slower. This will cause the unicycle to slow down. The third way is to coast. This is when you stop pedaling and let the unicycle roll. The fourth way is to use your feet to slow down. You can do this by dragging your feet on the ground. The fifth way is to jump off the unicycle. This will cause the unicycle to stop.