Grayskul is a hip hop duo from the United States, specifically from the Pacific Northwest. The group consists of rappers Onry Ozzborn and JFK (also known as Ninjaface). Formed in the early 2000s, Grayskul has been a prominent force in the underground hip hop scene, known for their unique blend of dark humor, intricate lyricism, and genre-bending production. Over the years, they have released several critically-acclaimed albums and EPs, often incorporating elements of horrorcore, industrial, and electronic music into their sound.

Throughout their career, Grayskul has collaborated with a variety of notable artists, including other prominent figures in the underground hip hop scene. Their music often explores themes of darkness, mortality, and social commentary, with a strong emphasis on storytelling and vivid imagery. With a distinctive sound that sets them apart from other hip hop acts, Grayskul has built a dedicated following among fans of underground and experimental hip hop.