Short for "Wikipedia binging." When you start on wikipedia and then get sucked in for hours, clicking links to absorb as much information as possible.
Though the spelling includes neither the "wiki" or the "binging" part, it is closest to how it's said aloud (rhymes with "binge"). Alternate spellings (winging, whinging, wingging, etc) often produce too much confusion. Debatable but acceptable: "to winge" or "to winje."
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.