The excessive and uncontrollable spurt of information out of a medical student. May or may not be related to the conversation (usually not).

Symptoms are exacerbated by the presence of a professor or other figure of authority.
Average Student1: Did you watch the game last night?

Gunner: "No, I was studyi... *professor comes in* Cell-derived mediators are normally sequestered in intracellular granules and can be rapidly secreted by granule exocytosis or are synthesized de novo in response to a stimulus."

Avg Student1: "WTF?"

Avg Student2: "Don't mind him, he's got gunnerrhea"
by Burned out in Med School November 23, 2010
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