Originaly the structure based on a famous video game so called League of Legends. In the game it means you died incredibly fast by a stealthy assassin, Rengar. In reality it means that something happened to you too fast and you couldn't even take a breath under the time period of the event.
Hey, Tim? What's up?
Oh... nothing good. My bag was stolen by a thief.
Dear! What happened?
I was just walking on the street and I was watching the cars and in the following moment my bag like vanished from my hands and sooner had I shouted my bag and the thief gone.
But why didn't you do anything?
I...I just couldn't! I got Rengared.
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.