A sarcastic remark saying you don't care. Usually said after someone says something incredibly stupid or random. It originated from the movie "Arthur" where Arthur tells his valet, Hobson, he's going to take a bath. Hobson, not caring, says "I'll alert the media."
Arthur: Hobson
Hobson: Yes, Arthur
Arthur: You know what I think I'm going to do?
Hobson: What, Arthur
Arthur: I'm going to take a bath
Hobson: I'll alert the media...
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.