A kit is often a genuine, very good looking young woman who is sought after by men of all ages, but she will turn down advances from men her own age. She is not after money or sex, though those are added bonuses. Instead, she feels more comfortable in a relationship where the man has the upper hand.
A kit should not be confused with a gold digger, which is also becoming increasingly prevalent; though many gold diggers will disguises themselves as kits in order to hide their ill intent towards older, wealthy men.
Guy 2: "Don't waste your time on that kit. She's been hanging out at those old guys table all night"
Guy 1: Man..I love when I see old dudes and young chicks together.
Guy 2: WTF bro? Why? That's gross!
Guy 1: Because they give me hope that when I'm their age I can still score a young hot kit.