Corrosion of Conformity (also known as C.O.C.) is an American heavy metal band from Raleigh, North Carolina formed in 1982. For almost the majority of its existence, the band has consisted of guitarist Woody Weatherman, bassist Mike Dean (who left in 1987 but rejoined six years later), drummer Reed Mullin (who left in 2001 but rejoined nine years later) and vocalist and rhythm guitarist Pepper Keenan (who joined the band in 1989). After a hiatus in 2006, Corrosion of Conformity returned in 2010 without Keenan, who had been busy touring and recording with Down, but announced their reunion with him in December 2014.