A type of confectionary which is black in colour and round. Some people like to suck on them, others prefer to lick them. They originate from Africa. Nowdays, due to the phobia of using the word "nigger", they're often known as blackballs.
And yes, this is true. There seriously is a confectionary called "niggerballs". Look it up.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."