When a female has her seat-belt on and it crosses between her boobs making them look bigger in size which would later create a boner for the guy sitting in the car next to her looking at them.
"Hey Chubb's look at blonde in the car next to us. She has some awesome seat-belt titty's. I'd sure like to stick my cock between them"
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.