Regan Farquhar (born February 12, 1978), better known by his stage name Busdriver, is a rapper and producer from Los Angeles, California. He has collaborated with rappers such as Myka 9, Nocando, 2Mex and Ellay Khule. His primary producers have been Daedelus, Boom Bip, Daddy Kev, Loden, Paris Zax, Omid and Nobody. He has also worked with D-Styles on two albums.

Born in Los Angeles, Regan Farquhar was introduced to hip hop at an early age, his father Ralph Farquhar being the screenwriter for the 1985 film Krush Groove. He began rapping at age 9. By 13, he was part of the group 4/29, which was inspired by the 1992 Los Angeles riots. At 16, he joined the Project Blowed scene.

Busdriver's solo album, Temporary Forever, was released in 2002.

He released Cosmic Cleavage on Big Dada in 2004. Busdriver released RoadKillOvercoat on Epitaph Records in 2007.[5] Another solo album, Jhelli Beam, was released on ANTI- in 2009. He is the executive producer of Thirsty Fish's 2009 album Watergate.

usdriver released a free mixtape Computer Cooties in 2010.[8] He also started a band Physical Forms with Jeff Byron, who is a former member of The Mae Shi, in the same year.[9] Physical Forms released a split 7-inch single, Hoofdriver, with Deerhoof on Polyvinyl Records.[10] Another of Busdriver's projects is Flash Bang Grenada, a collaboration with the rapper Nocando. The duo released the debut album, 10 Haters, on Hellfyre Club in 2011. Busdriver's solo album, Beaus$Eros, was released on Fake Four Inc. in 2012.

He released the free EP, Arguments with Dreams, later that year.