Jorge Alvarez aka Kurious is of Puerto Rican and Cuban descent, and grew up in Spanish Harlem. He debuted in 1991 on Powerule's "Young Stars from Nowhere". He then appeared on Pete Nice and DJ Daddy Rich's album Dust to Dust. The duo helped Kurious get a record deal with Columbia Records via Bobbito and Pete Nice's Hoppoh imprint. In 1992, he released his first single, "Walk Like a Duck". In 1994, Kurious released his debut album A Constipated Monkey, which featured the hit singles "I'm Kurious" and "Uptown Shit".
In 1999, he reemerged on MF DOOM's album Operation: Doomsday on the track "?" and contributed a track to a Monsta Island Czars Mixtape, under the alias Biollante.
Amalgam Digital reissued A Constipated Monkey with bonus tracks in 2007.