What you call white friends and aquantinses, whom are tight as hell with any culture, race. In other words they are not a hater on other people. Non judgmental. Nillas do NOT act black, they are who they are. A cracker is somebody whom is stale salty and judgmental.
Opposed to a black male calling their other black friend or homie; they would say what up nigga. A white person (not necessarily acting black) would call they homies and say hey mynilla! get it?