Pretending to have great life knowledge and trying to give everybody sage advice that is either obvious or counter productive. Especially if someone is too polite to tell you to knock it off the unneeded mentoring and you keep doing it and don't stop.
Brad was Yoda-ing his girlfriend excessively but she put up with it because he was cute. After she became successful she started Yoda-ing him and making him actually clean up after himself.
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.