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Like the acronym for "Oh hell no!" but described as a term said while, but not confined to, gaming. Where you are killed, or have seen a kill, that is deserving or a greater title than "owned" or "pwned".

Pronounced as "owned"
Guy 1: Omg, did you just see that kill?

Guy 2: You got OHN'd
by hotsauce90 November 17, 2010