A warm, perfectly spherical, chestnut tinted ball of refined, pure nig 324, an isotope of nigonium- a substance only found deep in the mines of watermelonia.
The Nigball rolled slowly towards the plutonium deposit; an inevitable, devastating reaction was going to take place.
An alliance among Negro's. Generally speaking this will be a gang of some sort, as black people are incapable of civil agreements. Maybe other niggalliances that aren't gangs are happening in Africa, but since nobody has ever been there before, it is impossible to know for sure.