normally to describe a red-head with a soul. Also used to describe a very down to earth, outgoing, pretty, athletic woman who will someday rule the world with an iron fist.
guy1: man, i am so scared, yet strangely attracted to her. its crazy!
guy2: why man? she's just another girl. Ain't nothing special.
guy1: naw man, you're wrong. That's Sara-Katelynn!