A young boy usually 9 to 14 who's body has just reached the stage of functional reproduction. The ability to reproduce is unknown to that person or anyone else. Accidental pregnancies came occur at this age very easily because of lack of knowledge of potency.
Did you hear about Cody's little brother? I guess the little cumpuppy got a girl pregnant.
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.