A thought runs through your head while you are busy doing something. You make a mental note to look it up when you are done. By the time you are ready to google it you realize you've forgotten what the heck it was you wanted to find out.
I was watching TV and wondered where I'd seen that woman before. I waited till the program was over and damn if I didn't forgoogle her name.
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.
You didn't get any napkins with your takeout pork fried rice? Womp womp.