The idea that everything is best, and all things happen for a greater purpose. In other words, a waste of time.

People who see the world through rose-colored glasses, people who are unrealistic, people who have no actual lives if they think the world is good. Ignorance is Bliss, after all

People who see life in the best possible light, or at least as being generally good. The most horrible, obnoxious people in the world.

An optimist is usually a person who always remains happy and cheerful despite various problems that arise. Besides being wonderful, joyful people to be around, they can also be dangerously unrealistic and at times, wickedly annoying. That is, if you're a pessimist. Optimists are generally loved and appreciated by society; however they are hated and despised by pessimists. (Who are boring, whining people).

Someone who lacks rational thinking or the understanding of Occam's Razor.

A kind of person who is most often a closet pessimist, and much like a pessimist can not see the virtue or value in any bad experiences. However, unlike a pessimist, who copes with that view by adopting the deluded, jaded notion that everything that can go wrong will go wrong so they aren't disappointed, the optimist follows the even more deluded notion that they will simply never have bad experiences.

See also: idiot, buffoon, fool, intellectually underdeveloped, mongoloid, deserved rape victim