SIG 

Shorthand for SIG-Sauer, a German-based manufacturer of some of the finest tactical pistols and rifles on the market. The acronym stands for "Schweizerische Industrie Gesellschaft," German for "Swiss Industrial Company." SIG, a Swiss firm, partnered with JP Sauer & Sohn, a German company, to form SIG-Sauer and broaden the market for their firearms. SIG pistols are used by the US military, the Naval Criminal Investigative Service (NCIS), the US Secret Service, the US Department of Homeland Security, and law enforcement all over the US. SIG pistols are available in several different configurations and several popular chamberings, including 9mm, .45 ACP, .40 S&W, .357 SIG, and .380 ACP. SIG pistols have a well-deserved reputation as being extremely well-made and highly reliable.

Did you see the SIG .40 that cop was packing?

SIG by AirbornePathogen July 30, 2011

sig 

Short for signature. It is someones signature thing they do or something they do a lot. Originated in Sammamish, Wa around the year 2005.

Guy 1: "Graham just said something really dumb"
Guy 2: "wow that is so sig"

sig by 5oul 3ater May 22, 2007

sig 

Short for "signature". Most recently used in relation to forum signature images.

Person 1: Have you been over to Allen's sig shop yet on the forums?
Person 2 (proudly): Not yet... I'm still using the sig from the last forum I was admin of.
Person 1: Dude... It's a pic of a baby in a diaper... This forum is about high-powered weaponry... Get a new sig, man.

sig by A. Prog. August 21, 2011

Sig 

A sweet pistol from Germany.

220, 225, 226, 228, 229, 239. The 232 is kind of gay though.

Sig by Big Eddie Scharf July 18, 2008

sig 

a thug ass pistol made in Germany

thug niggas like lil wayne can often be seen brandishing them

"White wife beater with the Sig underneath it"- I'm So Paid, Akon Ft. Lil Wayne & Young Jeezy

sig by jackson springfield67 February 8, 2009

SiG 

SiG (sometimes incorrectly referred to as cigg or cig), stands for SiGARMS. They are a fire arms manufacturer that is popular for their line of SiG SAUER pistols (they also manufacture rifles and air soft pieces). Popularized through some rap artists such as 50 Cent, they are at times the weapon of choice for some.

do not fuck with the kid,
i get biz with the sig,
i'll come where ya live, ya digg? - 50 Cent "I Get Money"

SiG by Carlos aka Los September 8, 2007

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