To mistakenly mergetwo vast quantities of poorly organised data together (such as a porn collection), resulting in a terminally disorganised superset of data.
When you've got a big stack of porn on your computer and you accidentally copy somebody elses big stack of porn files into that directory, you've achieved cross-pornination. This is a terrible thing as you'll forever be trying to weed out your duplicates.
A "semi-dream" someone has when A) they are about to fall asleep and B)about to dream. These are fairly easy to wake up from and can be aborted at any time.
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.