When a strange person hooks up with another person either equally or more weird then themselves. Often times one parter is dangerously obsessed with the other thereby making these relationships especially hard to escape from.
After escaping a long lilo and stitch relationship with Derek, Dawn had to change her name, grow a beard and leave town to secure her safety.
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.