When a man or woman has explosive diarrhea in a bathtub, causing a layer of "oil" to rise to the top, in which the couple engages in sexual intercourse in such bathtub.
A - "So i did some kinky stuff with Cindy last night."
B - "Oh really? What kind of stuff?"
A - "We did the BP Oil Spill. Best sex of my life!"
To pull out when having anal sex in a pool or hot tub with someone who has to take a shit. The resulting diarrhea will leak out into the water when you pull out, emulating the BP Oil Spill.
I gave your mom a BP Oil Spill last night, and clogged the drain in your hot tub.
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.