A reference to an internet meme whose roots trace back to the a webcomic "Toothpaste for Dinner" dated August 30, 2005, titled “Basic Electronic Symbols."
In this comic strip, there were drawings of a Resistor, a Capacitor, and JESUS CHRIST IT'S A LION GET IN THE CAR.
Nowadays the phrase is a typical response to phrases or combinations of phrases like such as:
"Rawr."
"I am a lion"
">:3"
Depending on whether Jesus Christ is present or not, he may render assistance to your current predicament.
Lion: "Rawr. I am a Lion. >:3"
You: "JESUS CHRIST ITS A LION GET IN THE CAR!"
Jesus Christ with a sawed-off shotgun: "I'll handle the lion, you just get in the car."
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.