The agreement you have with your significant other that you will do what they want after you have your nap. Breach of the pre-Naptual agreement results in a forfeit e.g. food or bedroom related fun stuffs.
"Dave broke our pre-naptual agreement last night and left the washing up on the side for me to do. Now he's got to buy me a subway."
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.