An older or elderly person, or someone younger who resembles or has the traits of an older/elderly person in thinking, actions, or demeanor yet desperately tries to fit in with the younger crowd by adopting their slang and or actions.
Old fogies think they are hip and in the know, which makes them out of know because once they get their hands on an element of pop culture they kill it.
Which is the reason why memes suffer and die of old age. Some memes on the other
"Them old fogies need to pop out of here before they get toasted by all the nonsense and straight fire coming out of the young poppin' whippersnappers".
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.