[srs bizness]
SIC is used when quoting someone to show that they misspelled a word.
It is a way of showing that you are a douchebag editor who is smarter than the person you are quoting.
Obviously I enjoy utilizing it.
IIRC = if I recall correctly.
Seriously, using google's define feature is a great way to figure these things out.
SIC
[/srs bizness]