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.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.