Something that a NY Mobster might tell a reporter when he knows that his time is limited. He's done some really outrageous shit to other gangsters, and as a result, he is a dead man. Like a moth caught on a hot light, he knows it's wrong, but the danger gives him such a charge that he really has ceased to care. A guy in this position would say this and really mean it.
"I got one foot in the grave, and the other on a banana peel." "We live this way, but we don't care."
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.