The phrase “slang for indignation” refers to informal or colloquial expressions used to describe feelings of anger, outrage, or moral displeasure. It is not a specific term with a fixed definition but rather a way to categorize certain slang words or phrases that convey a sense of being morally or emotionally offended. Understanding this phrase involves exploring what indignation means, how slang is used to express it, and examples of such language in everyday contexts.