Cannibal Ox is a New York hip-hop duo made up of Vast Aire and Vordul Mega, with El-P, the founder of the Definitive Jux label, handling the lion's share of production. Their first record,The Cold Vein, has been heralded as a major turning point in both hip-hop production and lyrical organization. Several notable guests appear like C-Rayz Walz, Alaska, Cryptic One, L.I.F.E. Long and El-P himself while Vordul's baritone and Vast's nasal-y styles connects the eclectic project together. For those interested in both the band and Def Jux the Revenge of the Robots DVD provides an interesting look into the lives of El-P, Vast Aire, Aesop Rock and other stars of the label.

The group was rumored to have disbanded, but in 2003 fellow Definitive Jux rapper Murs said "By the way, Can Ox is not broken up, it's just a rumor" between tracks on fellow Definitive Jux rapper Aesop Rock's album Bazooka Tooth. November 2005 brought the release of a live album, Return of the Ox: Live at CMJ, in the liner notes of which is the statement "Look out for the new full length LP by Cannibal Ox Summer of 06."

In addition to El-P, legendary producers Pete Rock and RZA have reportedly signed on to contribute to the project. DJ Mighty Mi, who collaborated with Vast Aire in 2005, would be a likely producer as well.

Cannibal Ox is reportedly broken up for good as of and 2008 when El-P dropped the knowledge that the two emcee's from the group have not been able to put anything together in music and their lives. Both of them are pursuing a promising solo career with two albums each under their respective belts.