This is the wrong way to spell "existence". There is no "a" in existence -- or in definitely, for that matter.
The same people who spell this wrong also can't seem to grasp the difference between "your" and "you're" or "their" and "they're", something the rest of us mastered in third grade.
"Your definately the most excellant guitarest in existance."
--a complete idiot
Maybe if you weren't functionally illiterate, you'd have a more "excellant" job.
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.