Day day is word used to call someone stupid, fucking retard, dumbass without sounding so harsh. So a great species of day day's is anyone with the first name Grace, because Graces have these special qualities.
A real ass nigga who will do anything for the gang and his circle, he will catch a opp nicca lackin and he will drop ya gang and set in front ya face to see if you gon fight or shoot, literally a real Nigga