[sic] 

1) also (sic); used when quoting someone and the person being quoted made a spelling error. This shows that the writer is aware of the mistake but doesn't correct it in order to quote properly.

2) used in chats and forums to point out that someone has made a dumb or disgusting remark. Also used to point out spelling and/or grammar mistakes or annoying txt tlk.
Can be used with or without square brackets.

1) "Your (sic) not aware of this mistake, are you?"

2)
A: ur a hot gurl??!1

B: sic

[sic] by Zombie Jesus_the second December 2, 2010

sic 

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

"Sic 'em, boy!"
"I'm gonna sic him on you."

sic by labortius December 8, 2006

(sic) 

A friendly term used by fans of Slipknot (Maggots) to basically say "stay cool" or "stay the same". Originated from the actual song by Slipknot called "(sic)".

Peace,
Stay (sic) fucker!

(sic) by a_Mad_Teaparty December 10, 2007

sic 

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.

The air ticket form Chicago to Shanghai costs about $1500 (sic!);
As he wrote in his message "tihs will be a looong juorney" (sic!);

sic by Jane.69 May 23, 2008

sic 

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.

John Clare was sorry one early work did not "describe the feelings
of a ryhming sic peasant strongly or localy sic enough"
(Autobiographical Writings 106).

sic by Bryce March 18, 2005

Sic 

Slang originating in Seattle meaning something amazing, incredible, or unbelievable.

Yo man did you see Kevin Durant against the Spurs the other night? Your boy KD is Sic!

Sic by Bleazy206 May 8, 2008

(sic) 

A friendly term used by fans of Slipknot (Maggots) to basically say "stay cool" or "stay the same". Originated from the actual song by Slipknot called "(sic)".

Peace,
Stay (sic) fucker!

(sic) by a_Mad_Teaparty May 7, 2008