The action in which your yelling/complaining is trash. People do not want to hear your garbage yelling, so if you are accused of having garbage yelling, you should stop right away. Being accused of garbage yelling is a very harsh insult and it can tear friendships apart.
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.