be anyone's

be anyone's

To be promiscuous (and thus easily wooed by anyone). I'm not surprised he left the bar with that girl—he's anyone's these days.

be anyone's

(of a person) be open to sexual advances from anyone. informal
References in classic literature ?
It is all very well for Rostov, whose father sends him ten thousand rubles at a time, to talk about not wishing to cringe to anybody and not be anyone's lackey, but I who have nothing but my brains have to make a career and must not miss opportunities, but must avail myself of them
Other children seemed to belong to their fathers and mothers, but she had never seemed to really be anyone's little girl.
I "straw my way" with herbs, until any-a-day in port, to join crew--stand tight to mast, be brunt of wave and windlash, and not be anyone's burden except, oh, the crew, the crew, the which a-one I'll my love to, my goods and ghastly goofs.
Everyone thinks I must be desperate to get off the shelf, but although I love this man and I am sure he loves me, I don't think I want to be anyone's wife.