A non-jewish boy who is taken advantage of by a (typically wealthy) jewish girl. Derived from the Hebrew word "goyim" which refers to non-Jews. The girl does not treat the boy as an equal or as a serious partner. She uses the boy to gain sexual gratification, companionship, emotional support, or whatever else she desires from him. In the end the boy is dumped and probably never realizes he was just being used.
Lauren: It looks like you and Josh are getting really serious, are you two officially a couple now?
Judith: He might think we're a couple, but he's totally clueless. He's just a goy toy they're always so naive. I'm going to dump him as soon as he says he loves me.
Lauren: But Josh is the captain of the lacrosse team and he's gorgeous. He's also so sweet. I can't believe you would treat him so terribly!
Judith: I didn't ask for your opinion, Lauren. One more word and you will no longer be invited to the my parent's home in the vineyard this summer.
Lauren: Ohmigod I love Martha's Vineyard! I'm sorry for speaking out of turn. Can we still be friends?