The technique of playing video games. Specifically, the involvement of avoiding conflict in multiplayer melee games, letting the other players fight and lose lives. Taking cheapshots, attacking players only when they already have a large amount of damage and claiming large victories from all of the kills obtained.
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.