look up any word, like dirty sanchez:
 
1.
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.
by littlebrownlab April 09, 2011