A disease that allows you to live for 80 years. At the end of 80 years you will die instantly. Cornswaggle flu is stronger than any disease or injury, and can even override death itself.
That slopclock gave me cornswaggle flu. I guess I should be making plans until I'm 80.
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.