The truth about jargon is that all groups have their own group of in-words and they use them to show that they belong to the group. Often they start off as really expressive metaphors: imagine the impact of "thinking outside the box" the very first time it was used: before it was overused it was much more expressive and communicated far more than "be imaginative". Unfortunately the power of such phrases is seductive, they become overused, develop in to cliches: now they obscure meaning rather than communicate it. That is when they become jargon. You just have to be really careful to make sure you notice before you start using the now-meaningless terms.