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prescient 

knowing before everyone-else, i.e. being a smart-ass - the kind of word utilised by someone who spends a considerable amount of time perusing large dictionaries in the hope of coming across obscure and rarely spoken words that they can try and integrate into their everyday conversation in order to impress his/her colleagues/friends.
prescient, oracular, vatic (of course you knew this already, didn't you..?)
prescient by mehhhh... May 24, 2010
Related Words

prescience 

Knowledge of actions or events before they occur; foresight. (this definition is from dictionary.com)
The woman showed prescience by opening the door before her friends arrived, so they could easily come inside.
prescience by JTPods November 13, 2003

praesigenic 

A fuck you term essentially. Used by plural people to express that their system origins are none of your business.
Kit: I’m in a system

Jane: Traumagenic or other
Kit: Praesigenic
Jane: What does that mean
Kit: That it’s none of your fucking business and you shouldn’t ask people such a personal and private thing, Jane.