1. Arrogant, self-centered, always right.
2. Sleazy, underhanded, scheming, with ulterior motives.
3. Thinks they are good at something they can only perform in a basic manner.
1. Look, I am not going to argue with you about this. You have no idea what my perspective is and to think you do makes you a douchebag.
2. Your wife's former boyfriend who calls after he gets divorced (often for being a douchebag) and then wants to 'catch-up' with her and be your 'friend'.
3. The guy who says he plays guitar and then struggles to choke out 'Smoke on the Water'