When someone judges you without gathing sufficient information to do so. You are offended not because you care what they think but because they have not exercised due diligence when forming an opinion about you.
A: "...and now they think I'm racist"
B: "But you ARE racist"
A: "But they don't know that. Its premature judgulation!"
B: "Sure they do. I told them you are a racist"
A: "Oh. Thats ok then"
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.