American hip hop supergroup formed in 2002, consisting of rapper MF DOOM and producer Madlib. Their only album, Madvillainy, earned critical acclaim and cult popularity, widely regarded as one of the greatest rap albums of all time and a benchmark record for alternative hip hop. Their intricate rhymes and lyrics, short song structures and use of obscure, stylistically diverse samples made for a sound that was generally unfriendly to commercial radio but was lauded for its influence on underground rap..