G-check 

When someone of a gang approaches someone who he thinks is a memeber of the same gang, he will ask him to state his name, rank, set, and OG.
short for ganster check, or checking someones "gangster"

I had to G-check that nigga over there, he was tryin to act like he was down.

G-check by Keith December 3, 2004

G-check 

a system where a gang member will test anothers gang members knowledge of the gang codes in a disrespectful manor.

this nigga just tried to G-check me, i know my shit.

G-check by scareface May 1, 2008

G-Check 

When you question one's true G-status.
A G-Check can be a direct contradiction of what one person says because another believes that the speaker is not G enough for their statement to be valid. A G check can be reversed if the origional speaker performs said G check issued by the second person. A G-Check can never be a one sided statement there must always be a claim before the check.

Scenario:
(Andy and Joe enter bar)
(hood rat passes)

-Andy: daum yo that bitch is fine imma hit that tonight. (starter statement)
-Joe: nigga please you got no chance (G-check)
- Andy procedes to hit that all night long and then brags to Joe about it, which is the G-Check turnaround.

G-Check by andyisown October 9, 2008

G-Check 

1) When someone is offending you or bothering you, you put the person in check or teach them a lesson so to speak.

"Jim Lee was talking shit, so I G-Checked his ass by robbing him!"

G-Check by Chris November 17, 2004

g check 

To test someones G or Gangsta. To ensure they are indeed the gangsta they are presenting themself as. Often seen as highly disrespectful.

He was across the street frontin like a boss and shit. So i went ova there and g checked him. Hommie got real humble.

g check by Mossberg July 10, 2006

G Check 

When you check if a lil nigga real or false flaggin'

Real Nigga No. 1 - Mane that lil nigga swear he bang 74

Real Nigga No. 2 - Time for a G Check

G Check by RealAssNigga December 22, 2010

G' Check

The art of keeping someone in line by proving your own dominance in any aspect of life

You just see Tiles G' Check Mucci's queer ass when he grabbed his beer during the hockey game?

G' Check by CK ho11erable October 18, 2008