The "MF" in MF DOOM most commonly stands for "Metal Face," reflecting his signature metal mask and supervillain persona inspired by Marvel's Doctor Doom

. When producing, he sometimes used "Metal Fingers" as the meaning behind "MF"

. While there are other interpretations and playful meanings (such as "Mad Flows" or "Motherf***ing"), "Metal Face" is the most widely accepted and referenced explanation in both interviews and fan discussions