Bad
injustice - A situation in which the rights of a person or a group are ignored, and they are treated unfairly.
The American Colonies felt that 'taxation without representation' was an injustice that, among other things, warranted a revolutionary war of independence against England.
dunce - A derogatory term used to ridicule someone who is not very clever, or who does not learn easily.
Being called the dunce of the class motivated Joe to work harder and he finished top of the class. Now sometimes he puts on a joker's costume to make fun of those who used to make fun of him.