In some card games, such as whisks, withholding a card of the current suit. In other words, when the pile is hearts you must play a heart if you have one, when the pile is spades you must play a spade etc. Reneging is when you break this rule by playing a different card. This results in losing 2 tricks or automatically losing the game.
-How the hell do you have a spade?
-What?
-Last round was spades and you put down a heart!
-Oh...
-You reneged!
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.