A grease bucket is reffering to a skanky kind of girl that loves to get filled with jizz on the regular.She just collects it like the mc donalds french fry oil that gets stored in a shack similar to the "grease buckets" house.
"jamie that chick is your regular greasebucket eh, just fill her up and put her out back and wait for another strange man in coveralls to pick her up"
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.