When you have something weird af or private in your copy and paste, you type "123" and then copy and paste it exactly 3 times to make sure that weird shit is out of your copy and paste
person 1: Bro, I had a picture of my credit card, and I almost pasted it 'nstead of that cute dog photo! Luckily, I 123123123'ed it.
Person 2: Same! I had some rowdy shit in my copy and paste and did that.
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.