A term used for two or more black people coming your direction, because they are dark, menacing, and bring trouble.
"Walk faster, dear, there's a couple of storm clouds moving our way."
A racial slur
against black people
, in reference to the album title, "Dark Side Of The Moon." They key word being "dark," as a comedic remark about the color of their skin.
Oh great, I've got a bunch of pink floyd enthusiasts sitting in my section, so I guess I'm working for free.