Mascras literally means Mass Crazy. When havoc can't be used to describe the insanity of a situation, Mascras is needed.
Mascras is also sarcsam backwards, which is a sarcasm spelt incorrecty! Of course if sarcasm was to be used in reverse the world would be mascras!
Laura: What is a firework?
Pat: Fireworks are the fricken mascras!!
Laura: What the hell is mascras?