Abbreviated with the acronym JMD, it is a mental state of being when one hears a song and devolops a liking for it, but abruptly changes their feelings about the song upon hearing the name of the artist or group who preforms the song. Getting it's name originally from the reaction by people first listening to the songs produced by artst John Mayer, but has and can be used for other groups and artists.
Jen: Hey, I like this song! Who sings this?
Sara: Lady Antebellum.
Jen: Oh. Turn it off.
Sara: I thought you liked it?
Jen: I can't now, it's classic John Mayer Disorder.
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.