An occupation. A grammar nazi would proofread Hitler's speeches, ensuring that all grammar was used correctly and effectively.
It's important to speak correctly. A grammar nazi would proofread the speeches used by Hitler to ensure the preservation of the beautiful German language.
by SlickSerpent99 May 27, 2018
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Someone with both a greater standard of all aspects of grammar (than most people) and the willingness to uphold said standards in all that (s)he says and writes, including but not limited to speaking in casual conversation and typing on the internet. Grammar Nazis are not constrained to the internet.

Zealous Grammar Nazis are also known to correct the grammar of other people when they feel the need to, although the act of correcting grammar does not necessarily denote someone as a Grammar Nazi. Someone who indulges in pointlessly correcting people, particularly nitpicking trivial mistakes, is more often a Grammar Troll. That's something else entirely.

True members of the Grammar Nazi Party will politely correct other people in a manner that does not shame the recipient and is always of mistakes that either change the meaning of the statement or are apparent that the recipient is ignorant of. Misuse of the apostrophe in "it's" and "its" and the misuse of homophones, however, are often corrected even if they do not apply to aforementioned standards.

As it has been mentioned that Grammar Nazis are not constrained to the internet, it should also be noted that Grammar Nazis interact in all languages that have codified rules of grammar (i.e. all official world languages). Some fictional languages, such as Klingon (Star Trek) and the Ancient Language (The Inheritance Cycle) are also included.
We Grammar Nazis take our languages, and thus their grammars, very seriously.
by tkdrocker806 December 27, 2014
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Some random douche:James is being a grammar nazi!
Jame:How about you graduate 2nd Grade and we'll talk
by Grammar Nazi September 22, 2015
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Grammar Nazi: My head exploded after seeing this definition! I must correct all of his grammar mistakes or else I will die.
by tinycrate August 18, 2015
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A native english-speaking person with an urge to correct every misspelled word, because they have a micropenis.
"Hello, how long is youre penis?"
"your*, I'm such a Grammar Nazi! ... 7 millimeters."
by Urban talker February 28, 2015
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A person who won't shut the fuck up about using correct grammar and will go to the ends of the earth to make sure you correct yourself when you use incorrect grammar
"Hey bill, did you about how Jeff is such a Grammar Nazi?"
"Yeah, I sure did Bob, did you also know that I am Jeff? We're not friends, and stop calling me Bill."
by Utervio_ November 6, 2019
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In the infamous words of Hank Moody

“People seem to be getting dumber and dumber. You know, I mean we have all this amazing technology and yet computers have turned into basically four figure wank machines. The internet was supposed to set us free, democratize us, but all it's really given us is Howard Dean's aborted candidacy and 24 hour a day access to kiddie porn. People... they don't write anymore, they blog. Instead of talking, they text, no punctuation, no grammar: LOL this and LMFAO that. You know, it just seems to me it's just a bunch of stupid people pseudo-communicating with a bunch of other stupid people at a proto-language that resembles more what cavemen used to speak than the King's English.”
Dude: I aint done nuffing!
Sherlock Holmes: You mean to say that you did, in actual fact, do something?
Dude: Grammar Nazi!
by psychomage June 6, 2016
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