SL2 is a hardcore/rave music act active in the early 1990s from London, England. They also recorded, remixed or produced under the names Slipmatt & Lime and T.H.C.
The act consisted of DJ/remixers Matt "Slipmatt" Nelson & John "Lime" Fernandez, with MC Jason "Jay J" James providing vocals, and were accompanied by two female rave/breakbeat dancers, Jo Millett (Lime's girlfriend at the time, and who would later become a jungle music producer) and Kelly Overett (who would later go on to be a member of the Italian Eurodance act Cappella). The latter two appeared with Nelson, Fernandez & James in live shows and their videos.
The SL2 name came from the initials of the founders of the group, Slipmatt (S) and Lime (L), because they were a duo; hence "SL2". The duo were school friends together in Loughton, Essex, where they shared a mutual love of hip-hop and reggae. Their first recording which they produced was in 1985, when they did a demo for a rap duo named Gino & Mickey. By 1988, the duo began going to raves, which is when they began their foray into their signature genre and the birth of the SL2 name. In 1989, Paul Nelson, Matt's brother, gave the group their first exposure by appearing at the Raindance Rave Festival.