A large (fat or manly) female that mingles with a group of incredibly attractive women in night clubs. The battle pig will scare away men attempting to interact with the attractive females. The only way to bypass the battle-pig is for a self-sacrificing man to offer himself to the battle pig so that his friends may get close to the attractive females.
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.