Wii butt is the phenomenon that occurs when a grossly out of shape person plays games such as wii bowling and the next day has a sore left butt cheek from the "bowling motion."
"Man, I was playing wii bowling last night and my arse is killing me today!"
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.