One of the most important language tools available. It is largely ignored by those too moronic to use it properly.
GRAMMAR

Wrong: There not feeling good cause Stacy and me didnt come.

Right: They're not feeling good because Stacy and I didn't come.
by Elizabeth Grey July 11, 2016
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Something people should be forced to learn, even if they are stupid. It is also something that makes people on-line think you are a stuck up bastard.
Me: Please, stop embarassing yourself.
Random Person On-line: u stukc uop basterd
by Mr.Grammar October 12, 2003
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Grammar is the set of rules of language and how we use it. Correct syntax, sentence structure and punctuation are all part of grammar.

People who use correct grammar capitalize the first letter of their sentences and end sentences with a full stop. They use commas and apostrophes when they're supposed to. They write sentences which neither run on or are sentence fragments.

Apparently, being on the Internet is an automatic exemption from using grammar and spelling. It's true, ask anyone why they don't use grammar on the Internet and their reason is always "Because it's MSN/the Internet/IRC". There's no real reason to not use grammar. Grammar is out of fashion nowadays, you're more likely to be ridiculed for using correct grammar than not.
A little lesson on common grammar errors:

Your - Implies ownership, example: "Your dog" or "Your house", NOT "Your stupid".

You're - Used to describe someone when talking directly to them, usually followed by an adjective or "a/an (insert noun)", example: "You're stupid".

There - Referring to location, example: "He's over there" or "Are you there?".

Their - Implies group ownership, example: "Their house" or "Their rights".

They're - Contracted form of "they are", example: "They're quite stupid".

It's - Contracted form of "it is", example: "It's really hot outside", NOT "A cat and it's kittens".

Its - Implies non-human ownership, example: "A dog and its bone".

He's - Contracted form of "he is", example: "He's so sexy", NOT "He's hat".

His - Implies male ownership, example: "His hat", NOT "His so sexy".

by Grammar_Nazi January 22, 2008
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Along with spelling, a construct unfortunately in short supply amongst web-based communiques.
A rapid survey of any definition group on this site will disclose a monstrous paucity of grammar.
by king_o_poo May 3, 2003
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Grammar is something President George W. Bush doesn't have.
"We have misunderestimated them"

"Is our children learning"

"We will take your dreams and... we will more better them."

"Grammar, is that a type of WMD?"
by Lazerwolf August 3, 2006
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(1) To a linguist, grammar is the structure of a language (as opposed to its lexicon, its words). Contrary to popular opinion, grammar is not something enforced by language academies, but it exists necessarily in all languages.

(2) To a non-linguist, grammar usually refers to various pre-scientific notions of "correct" usage.
Chinese grammar is very different from English.
by dattdso January 1, 2011
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A dead language. Often mocked and misunderstood by morons who learned it in second grade and abandoned it.
Scholar: "The quick brown fox jumps over the lazy dog."
Moron on computer: "omg u spk w/ gramr?!?!?!?!?! i thot no1 uzd it ne more!!!! wat do u uze it 4? y du u evn bothr? cuz leik no1 lieks 2 uz it cuz they r all dum!!@!! omgrotflmaocmailsxljjca2838ac83oacsmiley facecaz,s94u88447#$&@!!!!!!"
by Jason Q. Dedrickston August 19, 2005
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