A short-lived disease named after pop sensation Nicki Minaj. It begins when the patient hears one of her songs and dismisses it as not that good, only to have it on repeat inside their head nonstop for at least 24 hours. The next stage sees the patient have it on repeat on their iTunes nonstop for a further 24 hours. After this it tends to recede, leaving the patient not much worse off.
Doctor: "Why do you keep rapping in my waiting room?"
Patient: "I can't help it. I've been spitting bars since yesterday morning when I was exposed to a Nicki Minaj song on the radio."
Doctor: "It looks like a case of Minajitis. Nothing to worry about. It will go away by itself in the next couple of days."
Patient: "So when I'm in da hills I hang with Kristen Cavalleri. And when I'm in Miami I'm with Kourtney, Kim and Khloe. And when I'm in the..."
Doctor: "Please shut up, you risk infecting the other patients. Minajitis is highly contagious, Your Grace."