sig 

To talk shit to someone. Origin: VALLEJO, CALIFORNIA.

That man was tryin to sig on me so I hit the fool in his mouth.

sig by H22CL December 28, 2005

sig 

Special Interest Group

Do you know anything about the mechanics of these old cars?
No, but I found an SIG on the internet.

sig by Patricia Lincoln August 10, 2007

Sig 

a depressed tik toker @sig who is always sad and has 4.8m fans. Her real name is Signa Mae O’Keefe.

hey i found this really pretty girl on tik tok but she’s always depressed:/
that’s probably that sig girl
@sig

Sig by sjakk hahah yeet April 2, 2019

sig 

an abbreviation of significant other

Hey Hilary, you and the sig should really come over for a threesome.

sig by 101000001 August 21, 2007

SIG 

The acronym for "small intimate gathering", something that is not a party but is more than a few friends hanging out. It inevitably gets rowdy.

"So Joe Blow is having a SIG. You get the keg, i'll cover the hard liquor."

SIG by sexy SIG initiator April 30, 2010

sig 

The unique and/or distinctive signature one puts to be displayed every time he/she posts in a forum. Usually produced in Adobe Photoshop, it has a wide array of possibilities to be portrayed. There are many different sig styles, and entire forums are devoted only to the advancment of signature making.

*Here you go, I made this sig for you!
*Can you please rate my sig I just made?

sig by epic August 26, 2005

SIG 

SIG is a Service Industry Girl. This includes bartenders, waitresses, hostesses, etc.

Man, I can't get any sleep because of this SIG I'm dating. She never gets off 'till 2.

Dude, I gotta quit hollerin at these SIGs; They're all crazy.

SIG by kodaman August 5, 2009