When light from the sun is projected between large objects, such as mountains, and the rays of the sun can be seen perpendicularly when the light is scattered by tiny particles such as dust or fog.
When we were hiking near the ravine, the sun shined through the peaks and we could see the cross sun in the mist.
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.