Originally, the other, not-usually-played side of a 78-rpm phonograph record. From way back in the day, whenever it was that two-sided phonograph records became popular.
As '50's slang: You turn my record over, baby. Like, on the *flip* side. (See "flip out" = "go crazyover, freak out over, be turned on by someone or something.")
The dark places where douchebags, posers, rejects, thieves, and other horrible people reside. It is known as a Flip-Side because it is the opposite of our reality of relatively decent people.
"Hey, what's going on over there?"
"Oh, that's the Flip-Side, where the weird-o's go."
"Oh. Okay."
- An example of common education that should be shared among all people.
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.
You didn't get any napkins with your takeout pork fried rice? Womp womp.