A person not biologically related to you but one you still hold in the utmost regard; someone you trust with your life. Or just dat nigga walkin' down duh street, whatevs.
Random Nigga: Ay yo fam, wats really hood??
Person with Decent Education : Uh, do I know you?
Deliberate mispronunciation of the word "cock", slang for penis. Used for comedic effect.
"Suck a cack!!"