When someone hasn't bathed after long periods of time, they are considered to be "stank-stank" because of their awful stench. This also refers to the smell of feet, bad food, or doo-doo.
Dude: "Nigga, have you been walkin in da marsh?"
Dude 2: "Naw, nigga. I just been runnin around. Why?"
Dude: "Cause, yo feet got some stank-stank, dawg!"
Typically used by males, it refers to what daily supplement the fairer sex has taken to get the look she has. Used in referring to a woman that looks unkempt, dirty, and does not take care of herself. May also be used to refer to a woman that's overly promiscious.
Jeff: Take a look at the girl over there, I wonder if I got a shot.
Dave: Judging from the fact that she's got scabs on her knees and dresses like a tramp, I'm sure you do, she looks like she takes a daily dose of " Vitamin stank stank".