When 5 or more dicks ejaculate into a females mouth at one time, while the female chokes on the sperm and it runs through the nostrils of the female to form something like the flow of the nile river.
Many pornstars have perfected the nile river with 5 no lifes did this in now-deleted pornos.
Spotted in "Girls" by the Beastie Boys on the album "Licensed To Ill"
Essentially is referencing everywhere in the world. From Mid-Western of the US' White Castle Fast Food all the way to the Nile River in Africa.
Ad-Rock: I like the way that they walk
And it's chill to hear them talk
And I can always make them smile From White Castle to the Nile
Girl: I get looks every time I go out, from White Castle to The Nile!