not the end of the world
Not the very worst thing that could have happened; not causing very serious or insurmountable problems. Don’t worry about the dent. It's not the end of the world. It would be great if I got this teaching position, but I guess it isn't the end of the world if they pass me over.
not the end of the world
COMMON You say it is not the end of the world to mean that something bad that happens is not too serious. If I make a mistake, it's not the end of the world. I can always go back and correct it. I've enjoyed my time in international football, but it won't be the end of the world if I'm not selected again.