Filk is a musical genre that originated in the science fiction and fantasy fandoms. While the term itself is relatively new, there have been many similar types of music and art that have existed throughout history. Other synonyms for filk may include nerdcore, geek rock, or sci-fi folk. These terms all describe music that is typically made by fans of science fiction, fantasy, or other forms of popular culture. The term "filk" may also be used to refer more broadly to any sort of fan-made music, whether it be inspired by pop culture, politics, or personal experience. Ultimately, whatever you want to call it, there is no denying the creativity and passion that goes into making filk and similar types of music.