grammar butthole 

A douche-bag who thinks he's intellectually superior to everyone else, but only possesses enough neural connections to point out simple grammatical or syntax errors that nobody cares about. Usually someone who didn't pay enough attention in grade school and thought they were God's gift to everyone else, but may have picked up a grammar rule or two on accident.

My grammar butthole professor failed my term paper because I incorrectly used some semicolons.

grammar butthole by Gio208 September 18, 2010