Short for, "Know What I'm Sayin". When people say 'know what I'm sayin' real fast, it usually comes out 'knam sayin'.
Black Guy: Yo dawg, why you be talkin like you black, you white-ass cracka?
White Guy: I grew up in some ghetto ass areas, knam sayin?
White Guy: I grew up in some ghetto ass areas, knam sayin?
by ghettowhitekid September 26, 2012