Ntokozo Mdluli (born 13 October 1980), known professionally as K.O, is a South African rapper. He began his career as a member of Teargas, a hip hop group which released its debut album titled K'shubile K'bovu (2006), followed by Wafa Wafa (2008), Dark or Blue (2009) and last album Num8er Num8er (2012).

Following Teargas departure, K.O pursued his solo career and released his solo debut album Skhanda Republic (2014), debuted at #1 in South Africa and was certified platinum Recording Industry of South Africa (RiSA).