Someone experiencing periods of mania or hypomania, mixed with the lows of depression. Mood changes can come quickly with elation and depression at the same time.
Stephan was so narcissistically caught up in his own euphoria, then suddenly found himself trapped in his bipolaristic world of failed attempts to achieve happiness.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.