Boris at Last -Feedbacker- (or simply called Feedbacker) is the sixth album by the Japanese experimental music band Boris. There is an official DVD released on 2005 and limited to 500 which was released by Diwphalanx Records. This DVD was originally an unofficial recording of the band performing the entirety of "Feedbacker" live in New York and entitled Bootleg -Feedbacker-. The official DVD release depicts a different member of the band lying in a pool of blood similar to the album cover.
The album incorporates many different rock elements and because of it has become a song that the band frequently revisits on tour. On 13 September 2009, as a special set for the Flaming Lips-curated day of All Tomorrow's Parties New York 2009 in Monticello, Boris performed the album in its entirety. They performed the album again at the Pavement curated ATP at MineheadButlin's on 15 May 2010.