"Scoochie" is an adlib used by Gucci Mane in most of his songs that makes it sounds someone's always in his way when he's recording songs, asking them to scooch over or move over.
When a girl's stomach hangs over her coochie. Usually hangs out of the bottom of a shirt. Resembles a large flap of fat. Not to be confused with a fupa (see definition no. 4).
Joe: "Holy crap, did you see the scoochie on that girl?"
Dan: "It was impossible to miss. There's no amount of P90X to fix that."