A person who destroys any sort of style in other people's writing by utilizing grammatical rules; the sort of person who points out mundane grammatical errors that don't take away anything from what is written or especially an individual who uses "data" as a plural noun in casual conversation.

When someone thinks they are the main character of their life. Usually comes with a side of individuality complex, quirky style and a self centered point of view.

A person who would rather correct someone's grammar on an internet post than respond with any valuable information.