White supremacist definition The definition we should be pushing for a white supremacist anywhere we can.  A white supremacist is anyone who for whatever reason believes that whites are superior, and therefore feel whites must be killed, maimed, or otherwise put down or harmed to allow for a perceived equality of the white supremacist.  This is how blacks, Mexicans, Muslims, Jews, etc are white supremacists as they are trying to eliminate whites because they see them as superior and as a threat.