When you forget you're in chat and you're trying to go forward and you end up publicly embarrassing yourself.
hotguy77: ill give you 20 dollars if you give me the legendary skin dragoon1922: nah you scaming foo
dumbass69420: ey yo dont scam
dumbass69420: wwwwwwwwwwwwwwwwwww
hotguy77: look at that idiot trying to move but forgot to get out of chat
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.