a) The place inside an airship or boat where goods are stored.
b) If you don't know what a cargo cult is, you probably misheard it as cargo hold, causing you to look up a definition.
Flight attendant: Hey, fox wizard, we'll pay you to defend the cargo hold in the back of the zeppelin.
Fox wizard: Sure. It's not like I have anything else to be doing back here.
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.