In a recent Facebook post for a friend of mine, he used the phrase
make-believe in the sentence to indicate a bad pretending habit of some institute. His usage was similar to saying:
Just keep pretending. After all, the entire country is all make-believe.
As from the famous company slogan, I thought that phrase implies a good meaning. But the previous usage made me think: What is the usage of this phrase? and is it an idiom or some kind of a known phrase or expression?