Genre-busting
"Genre-busting" is a term used occasionally in reviews of written work, music and visual art and refers to the author or artist's ability to cross over two or more established styles. For instance, in writing, to combine the horror genre with a western or hard-boiled detective story with science fiction. In music, the term may refer to a song combining styles or defying classification. The sound of the term calls to mind other uses of "buster" such as "crime buster", "Gangbusters", "Ghostbusters", "Dambusters", etc. Creative people don't always feel comfortable working within an established category.