Mii too Share definition Flag Derived from me too. A term describing the custom avatars from the New Xbox Experience, or NXE. The custom avatars have a similar appearance to the miis on Nintendo Wii. "Xbox Live's new avatars look more like 'mii too' than doing their own thing." Mii too by Dr. Claw February 22, 2009 0 0 Get merch Get the Mii too mug. Buy Now — $32.95 See more merch