When someone lives a great life and helps others, hence is a hero, however as time passes they are corrupted for whatever reason, and live long enough to become the villain. This change is inevitable for most heroes, unless they take the opportunity to die a hero earlier (or quit the business of being a hero, as its suggested bruce wayne was trying to in the dark knight rises' end)

Quote by Harvey Dent in Batman The Dark Knight

A term used to reference cannabis/marijuana/weed.