A sea shanty, chantey, or chanty is a genre of traditional folk song that was once commonly sung as a work song to accompany rhythmical labor aboard large merchant sailing vessels. The term shanty most accurately refers to a specific style of work song belonging to this historical repertoire. However, in recent, popular usage, the scope of its definition is sometimes expanded to admit a wider range of repertoire and characteristics, or to refer to a "maritime work song" in general.

Folk music is a music genre that includes traditional folk music and the contemporary genre that evolved from the former during the 20th-century folk revival. Some types of folk music may be called world music. Traditional folk music has been defined in several ways: as music transmitted orally, music with unknown composers, music that is played on traditional instruments, music about cultural or national identity, music that changes between generations, music associated with a people's folklore, or music performed by custom over a long period of time. It has been contrasted with commercial and classical styles. The term originated in the 19th century, but folk music extends beyond that.