Manley Augustus Buchanan (born April 19, 1949, Trenchtown, Kingston, Jamaica), better known as Big Youth (sometimes called Jah Youth), is a Jamaican DJ, mostly known for his work during the 1970s. Influenced by U-Roy, he started singing with Lord Tippertone's sound system in 1970. His first LP Chi Chi Run was produced by Prince Buster in 1971.

The name of the band Sonic Youth is in part a tribute to Big Youth.

"Yes, me come inna de music as Rasta, me a de original rastaman who enter it." Big Youth, Italy, 2001

Discography

* Chi Chi Run - Fab 1972 (including just three Big Youth songs)
* Screaming Target - Trojan 1973
* Reggae Phenomenon - Augustus Buchanen 1975
* Dreadlocks Dread - Klick 1975
* Natty Cultural Dread - Trojan 1976
* Hit the Road Jack - Trojan 1976
* Isiah First Prohphet of Old - Nicola Delita, Caroline 1978
* Progress - Nocola Delita 1979
* Rock Holy - Negusa Negast 1980
* Some Great Big Youth - Heartbeat 1981
* Chanting Dread Inna Fine Style - Heartbeat 1982
* Live at Reggae Sunsplash - Genes 1984
* A Luta Continua (The Struggle Continue) - Heartbeat 1986
* Manifestation - Heartbeat 1988
* Jamming in the House of Dread - Danceteria 1990
* Higher Grounds - JR, VP Records 1995
* Save the children - Declic 1995
* Reggae Gi Dem Dub - Nicola Delita