Kim Yoon Sung, known professionally as Gaeko (개코, meaning dog's snout) is a South Korean hip hop recording artist. He and Choiza comprise the hip hop duo Dynamic Duo, which rose to fame upon the release of their debut album Taxi Driver in 2004. In 2015, he released his first solo album, Redingray. He's know for participating as a producer and judge on Korean hip-hop survival show Show Me The Money.

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