Corrosion of Conformity (also known as COC) is an American heavy metal band from Raleigh, North Carolina, formed in 1982. The band has undergone multiple line-up changes throughout its existence, with guitarist Woody Weatherman as the sole constant member. Weatherman, founding bassist Mike Dean, founding drummer Reed Mullin, and vocalist and rhythm guitarist Pepper Keenan (who joined the band in 1989) are widely regarded as its 'classic' line-up. 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.