A Delta Dawn Bitch is a bitch that you don’t like, but you aren’t sure why you don’t like them. You just don’t.
Margaret: Are you coming out to eat with us?
Marissa: I don’t know. Is Carla going to be there?
Margaret: Maybe. Why?
Marissa: Because I can’t stand that Delta Dawn Bitch.
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.