Shit that real niggaz do, such as sellin' drugs, killin' other niggaz, fuckin' bitches and then neglectin' his kids, goin' to buy milk and never comin' back, smokin' weed, or eatin' a lot of chicken.
Used after someone does something which they think is great they may say "it's that realnigga shit". This word was created by Josh Tetteh after he got a fresh trim.