It's when people stereotype gangs without knowing the real purpose of the organization or anything about it.
Person 1: Man, all bloods do is rob people. That is what they stand for.
Person 2: That's so gangist, you don't know no bloods.
Person 2: That's so gangist, you don't know no bloods.
by ministryoftruth January 08, 2010
100 refers to the state of keeping it real or being completely honest about a situation. Gun it refers to destroying something. Therefore to 100 or gun it means that either you keep it real or prepare to die.
by ministryoftruth December 18, 2011