The response given to someone who says or does something stupid or something you don't care about without making them feel as bad or stupid as you know they should. Made popular by GTA San Andreas
Example 1
Guy 1: hey man what you up to? Wanna get some beers?
Guy 2: naw dude, gunna stay in and watch some scary movies.
Guy 1: .... really?! That's gangsta CJ
Guy 2: what?
Example 2
Guy 1: *dancing wildly and smashes bouncer in the face
Guy 2: Oh shit! That's gangsta CJ!!
Guy 1: hey man what you up to? Wanna get some beers?
Guy 2: naw dude, gunna stay in and watch some scary movies.
Guy 1: .... really?! That's gangsta CJ
Guy 2: what?
Example 2
Guy 1: *dancing wildly and smashes bouncer in the face
Guy 2: Oh shit! That's gangsta CJ!!
by Captain Shytcaulk December 29, 2011