Yuga is a person who is very true to his/her morals. Theyll never lie when it comes to important discussions and when they do lie they make as obvious as they could or take it back after lying. Yugas are very loyal so if you chose to be with one make sure you'll stay loyal too. They are very kind and would tend to anyone in need.
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.