Marlon G. Fletcher (July 29, 1971 – May 22, 2003), better known under his stage name Big DS, was an American hardcore rapper and record producer from Queens, New York.
He was co-founder of the hardcore rap group Onyx. As a part of Onyx Big DS released one album "Bacdafucup" and 8 singles on JMJ Records and featured on 1993's Judgment Night (soundtrack). As a part of Onyx Big DS was nominated as "Rap/Hip-Hop New Artist" on American Music Awards of 1994 and won "Best Rap Album" on 1994 Soul Train Music Awards.