https://www.urbandictionary.com/define.php?term=outrage+fatigue&defid=5770825

noun. outrage fatigue. the exhaustion and entropy that occurs from too much outrage. Occurs in waves, often during peak election cycles. Outrage fatigue tends to afflict politically active people, and can be worse when your party is not in power, or has a power deficit. It escalates during environmental catastrophes, especially ones that are caused by human negligence. It also develops during troublesome economic times like corporate bailouts and high unemployment. Outrage fatigue may threaten close friendships.

After the week of union protests in Madison, I'm finished. I have serious "outrage fatigue".

When I heard about the latest military intervention in Libya, I was stunned by my apathy,lack of concern and disinterest. This is my worst ever episode of "outrage fatigue".