The friend who is unencumbered or reserved, completely open and honest with any personal information as well as personal preferences. They often demonstrate that by stepping over the line and providing Too Much Information.
After spending some time together on a car ridesarah went from being a friend to an unfiltered friend; I know too much about her.
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.