"Douchebag" was a fairly popular insult at my schools when I was a teenager in the early 80s. I didn't realize it had fallen out of favor; I thought the reason I didn't hear it as much was that my friends and I had matured. I had assumed it's recent resurgence on TV was due to relaxing standards (like with "bitch"). I'm so unhip, however, that I say "hip." So what do I know...