A fart that is expelled while one is lying down on one's back with legs in the air and spread open (spread eagle), accompanied by a fine mist of watery fecal matter.
While she was blowing me on my bed, I pulled back my legs and let a greasedeagle fly.
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.