sic, meaning "said in context" is used in literature to prove that the writer knows his mistake, but is publishing it anyways.
If the quotation you are using contains a grammatical error, you may reproduce that error, but you must write "sic" after it to indicate the error is not yours. You may also want to use "sic" after an offensive word or comment that you are quoting to indicate that you do not share the speaker's attitude.

Square brackets are most commonly used around the word 'sic' (from the Latin 'sicut', meaning 'just as'), to explain the status of an apparent mistake. Generally, sic means the foregoing mistake (or apparent mistake) was made by the writer/speaker I am quoting; I am but the faithful messenger; in fact I never get anything wrong myself. Book reviewers in particular adore to use sic. It makes them feel terrific, because what it means is that they've spotted this apparent mistake, thank you, so there is no point in writing in. However, there are distinctions within sic: it can signify two different things:

1) This isn't a mistake, actually, it just looks like one to the casual eye.
2) Tee hee, what a dreadful error! But it would be dishonest of me to correct it.

~ From 'Eats, Shoots and Leaves' by Lynne Truss

(sic) (Latin for "thus") is a bracketed expression used to indicate that an unusual spelling, phrase, or any other preceding quoted material is intended to be read or printed exactly as shown (rather than being an error) and should not be corrected. When found in a French document, (sic) stands for "Sans Intention Comique" (without comic intention) meaning that even if the preceding text could be understood as funny, it was not meant to be. It is used by writers quoting someone to alert the reader to the fact that an error or other weirdness in the quoted material is in the original, and not an error of transcription. "Sic" is almost always enclosed in parentheses.

A simple way to remember what it means is to consider sic as a pnemonic for 'spelt in context'.

Used in lieu of "attack," and used in association with the aggressive actions of someone or something, especially a dog.

From Latin "sicut" which means something like "it was this way", "like that", "exactly this way".
It's usually used in the bracket in the text besides the word which could be recognized as written in the wrong way;
Mostly used to a quoted spelling mistake, implying for the reader that it isn't our mistake, but it was this way in the original.

Sleep In Car drunk.

When you think you're good to drive, and end up waking up to the sunrise in your reclined seat.

slight internal chuckle

An extremely nerdy term used to express feelings of laughter or happiness. An alternative to the acronym LoL (Laugh out Loud). THIS TERM IS COPYRIGHTED BY MR. CADRA FROM YLHS!

P.S- 4th period cool kids made this ;)

Someone who is against the proposed cuts made by the current British government; applies to all sections of society in disagreement with the plans.

Abbreviated form of 'sicosnipophobic'; which is, according to the mockumentary "Rock, Paper, Scissors: The Way of the Tosser", is someone afraid of scissors.

This short form is appealing because it is monosyllabic, as well as being homophonic and alliterative with its opposite, a 'snip'; ie. someone who is /for/ the cuts. The scissors analogy fits as it has become a symbol of the proposed cuts to the budget.