What is "madvillainy"

Madvillainy is the debut album by American hip hop duo Madvillain, a group consisting of MF Doom ( MC) and Madlib ( producer). It was released on March 23, 2004 on Stones Throw Records to widespread critical acclaim, scoring a 93 out of 100 on Metacritic. The album also achieved moderate commercial success, peaking at number 179 on the US Billboard 200, and attracted much attention from media outlets not usually covering hip hop music, including The New Yorker.