Short for "magic nigger," a derogatory term used for black characters in films and television shows who serve no purpose other than to provide mystical aid and guidance to white characters.
My friend insisted that Morpheus from "The Matrix" is just as big a migger as the title character in "Legend of Baggar Vance," but his arguments didn't convince me.
A "Migger" is someone who is from Michigan and is a Gamer. The longer form is MI-Gamer, or, Michigan Gamer. MIG is short for MichiganGamer, however, add 'ger (to emphasize Michigander) to the end and you have Migger. In Michigan, a Migger is known as a local gamer who originated or lives in Michigan.