my initial thought was the usual thing, that it has a totally different meaning when used by black people than when used by white people, but then i realized, b

my initial thought was the usual thing, that it has a totally different meaning when used by black people than when used by white people, but then i realized, because the way you put it, "...every movie with black people has them screaming it", that i really haven't heard it used by actual black people in the flesh all that often. i would guess no more than how often i've heard white people using it, again, in the flesh.