TMJ

So a patient was complaining of some low-grade fever among other symptoms and offered up that the fever might be due to her TMJ. In case there was some confusion about the meaning of this abbreviation (normally used to indicate a syndrome of pain involving the temporo-mandibular joint), the patient was asked, "What do you mean by TMJ?"

"You know, the Tooth-Mouth-Jaw Syndrome."
"What?"
"The Tooth-Mouth-Jaw Syndrome. It feels sore at the point in front of my ear, and I feel a dripping in there that could be the cause of the fever."

I'm still not sure what the patient was talking about, but you have to give her points for at least being creative.