Definitions by The Lesser Evil from Scene III

jargonnaut 

An individual who speaks using precise acronyms, slang, and obscure words related to one or more specialized professions even when not talking to other individuals in the profession; someone who talks over others' heads subconsciously using specialized words.

Bones is such a jargonnaut --- she left the entire jury behind while describing that kid's skeleton.

I don't get invited to parties anymore because whenever I do, I turn into a total jargonnaut and look like an elitist asshole.

jargonnaut by The Lesser Evil from Scene III June 30, 2011