pYnOiBoY178 Share definition Flag A kid who is not PynOi hes gay.MUAHAHAH he talks to cathy all day long. Hey pYnOiBoY178 whta you doin? pYnOiBoY178: the usual. (talking to cathy) pYnOiBoY178 by PersBoi July 11, 2003 Get the pYnOiBoY178 mug.