Is what you would call a dumb person, who's big as a tank, with a brain the size of a peanut, very trusting, but easily manipulated, has either a pet dog or hamster named Duckie, sees things a little different than the rest of us, and believes in Bigfoot, and sometimes goes by the name Cornbred.
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.