Jackie-O Motherfucker (or JOMF) is an American experimental rock group that formed in Portland, Oregon in 1994.Jackie-O Motherfucker began as a duo consisting of multi-instrumentalist Tom Greenwood and saxophonist Nester Bucket. The group has had more than forty rotating members drawn from the U.S. experimental scene. As of 2006, the core of the group is founding member Greenwood.JOMF's music draws from a variety of subgenres including drone, free jazz, space-rock and is heavily improvisational