Rappers MF Doom and MF Grimm are longtime collaborators — and, until recently, close friends. They came up together as part of New York City's M.I.C. (Monsta Island Czars) crew in the 1990s; Doom was originally known as Zev Love X. The two went on to share billing on many albums, as well as the MF nickname, which is sometimes said to mean "Mad Flows" (or in Doom's... More >>>