Often inaccurately defined as a Grammar
Nazi (even here on the Urban
Dictionary, see tags), a Grammar
Troll is, most simply, someone who corrects the grammar of other
people. Grammar Nazis may also correct grammar, but there are differences to be noted.
1) Grammar Trolls have no inhibition. They will correct all grammatical mistakes they see. Unlike a Grammar
Nazi, they will correct trivial spelling a punctuation errors and nitpick word
choice, especially when those minor errors or diction do not affect the meaning of the statement.
2) Grammar Trolls will do nothing but correct grammar. Most Grammar Trolls are aroused when finding themselves in arguments they realize they cannot win. That is when they resort to pettily correcting the most trivial mistakes, especially the misuse of homophones, in an attempt to undermine their opponents' credibility while not actually attempting to refute their opponents' points nor defend their own.
3) A Grammar
Troll may use improper grammar while making these corrections and attacks. It is important to note that even true Grammar Nazis make mistakes. However, if while correcting someone a person makes a painful grammatical blunder that should not have been made, especially if multiple are made in succession, that person is a Grammar
Troll.
4) Grammar Trolls are generally assholes. Generally, a Grammar
Nazi will be respectful in correcting grammar. But a Grammar
Troll is in almost all cases condescending, smug, and spiteful.
