Top Definition
When someone listens obsessively to the new 'rock' diva Miley Cyrus, they catch Mileyitis. Mileyitis is a love of crappy music and leads you into a blackhole of standing up for little miss Cyrus and her music. It often ends in death (of your social life) and/or bad fashion sense.
Girl 1: Omigod! Miley is playing -insert stage name here- next year! I'd give my life to go!

Girl 2: Woah, severe case of Mileyitis!
by L u c y L a v a .xO. November 02, 2008

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