A person who steps in between two feuding people for the sole reason of making themselves look like a peacemaker and receiving kudos for their self-righteous effort. By relativizing the claims of each person in the dispute, and standing open armed with a pseudo-serene expression on their face, they naff off everyone in the room, but still think they are the second coming of Gandhi.
It was all sorting itself out until Steve started pulling a Gandhi, and then all hell brokeloose.
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.