What is a Grammar Nazi?

Does someone constantly correct your grammar, either in person or online?

If you do, then you just might know a grammar nazi.

Grammar nazis are quick to point out improper use of the words their, they're and there.

They're fast to comment on a misplaced modifier. They'll even criticize your use (or lack thereof) of a problematic comma or semi-colon.

So as you strive to become a better writer, should you take the advice of the grammar nazi or ignore it?

Understanding where t...