A hornpipe is a kind of dance that people do to music. It's called a hornpipe because the music sounds like it's coming from a musical instrument called a hornpipe.
The dance is usually done by one person, and they move their feet and hands in a pattern that goes well with the music. The steps are usually quick and bouncy, and the arms move in a way that looks like they're playing the hornpipe. The dance can be done by itself or with a group of people.
Sometimes, people also play the hornpipe on a musical instrument. The hornpipe is a type of jig, which is a kind of up-tempo dance that's common in Ireland and Scotland.
Overall, the hornpipe is a fun dance that people do to lively music.