Excuse me, what was that again?

My regular checkup at the dentist frequently starts off with a discussion about my dental hygiene, but often turns into a legal discussion. My dentist will occasionally tell me to stop talking in legal "mumbo jumbo" (for some reason he tells me of the origins of the phrase). "Wait a minute," I say,"I'm just telling you the law." He then moves the conversation back to my teeth and explains, more or less, that my problem has something to do with the fact that my "mesiolingual cusp is twice the size of the distolingual cusp." Uh, what? One more time, please?

Then, I have the irresistable urge to quote from an episode of Psych, one of my favorite TV shows (fake psychics, real detectives), where psychic Shawn Spencer pretends to be a doctor but doesn't know any medical terminology: