Top Definition
One who's a smart ass, the one, the only, the original smart ass
Wow, that guy over there's a deconus!

Sarcastically spearking guy:
Guy 1: Whoa, that guy over there think's he's such a deconus, he is soooo smart that no one could ever be on his level, wow what a comeback, you freaking deconus!

Guy 2: I concur

by SweetK September 20, 2007
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