an a in a circle represents anarchy...it's like the symbol of anarchy. on jim morrison's tomb the first o has an A in it and the second o has a peace sign in it...like this JIM M(A)RRISON. except with the second a peace sign inside and the first a complete circle not parantheses
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.