Newbie, do you happen to know what a zebra is? That patient ju...
Dr. Cox: Newbie, do you happen to know what a zebra is?
J.D.: That patient just mocked me!
Dr. Cox: It's a diagnosis of a ridiculously obscure disease when it's much more likely that the patient has a common illness presenting with uncommon symptoms, in other words, if you hear hoof beats, you just go ahead and think horsies and not zebras, mkay mister silly bear?