Have you ever heard music that didn't have any specific notes or pitches? That type of music is called "unpitched". It means the sounds you hear don't have a specific place on a musical scale.
For example, if you hit a drum, it might make a different sound than if you hit a bell. But the sounds coming from the drum and the bell don't have any specific musical notes or pitches. They are just different sounds.
Unpitched music is often used in things like movies or TV shows to create sound effects for things like explosions or crashing. It's also used in some types of music like percussion bands or some types of folk music.
So, in summary, unpitched music is music that doesn't have any specific notes or pitches and is often used to create sound effects or in certain types of music like percussion bands.