Commonly used in the Caribbean islands referring to their desire to kill white people. Considering the extensive use of slaves in the Caribbean, understandable.
The traditional, lyrically aggressive hip-hop sub-genre--dedicated to themes of violence, anarchy and social disruption; UNLIKE the current watered-down, lame-ass, mainstream dollar-driven verbal diarrhea...
Yo, you can't be playin' that kill-whitey music up in here; if bubba hears it, he gonna come kick some fuckin ass...
Far from being a black-power site, this is a harmless site showcasing a bunch of eccentric female singers and groups, notably tatu, kate bush and tori amos. I'm not sure what the title has to do with the content, but it looks pretty dumb.
Be sure to note that should the title be changed to mention a minority race, even if the content were the same, white-man-killer.com would be shut down.