When you say just because you either do not have a good reason for something or you do not want to explain the real reason. You will find many just because quotes on the Internet that show that this phrase is a cop out, and you are making an excuse without going to the trouble to come up with a better reason. The actions or words behind the phrase just because can be good or bad. You may say I love you or bring flowers to your significant other just because it makes them happy and that makes you happy, without any other reason or any ulterior motive. Often criminals who can not come up with a good explanation for crimes that they have committed will say just because when asked why they did it.