To take an argument and research every possible aspect of it on Wikipedia, memorize the most relevant facts, mull over your side of the argument until its finely honed like the edge of a samurai sword, then attack the people who are opposing your viewpoint and then metaphorically slice them into tiny bits while refusing to accept alternate viewpoints.
A very unclean, dirty, & otherwise grubby person that shops for clothing & apparel on Craig's List and has a general distain for personal hygiene. Sometimes referred to as a grubby bear.
That grubinsky just paid $4 for box of used tube socks.
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.