the end of the world
An extremely bad situation or event. Almost always used hyperbolically and ironically. Well, whoever is elected, it won't be the end of the world; each candidate is as good or bad as the other in my book. The accident was just a little fender-bender, but he's acting like it's the end of the world.
the end of the world
a complete disaster. informal This expression comes from the idea of the termination of life on earth as the ultimate catastrophe, but is often used with the negative as a reassurance that a mistake or setback is not that important.
1994 Face If people are buying my records that's good, but if they're not it's not the end of the world.