When you are having vaginal or anal sex with a girl from behind and she asks you three times to wear a condom. You then succumb to her request despite the fact that you are not a sailor. Just before you are about to finish you remove the condom with your throwing hand and drop it over your right shoulder (like in football) into your left hand behind your back before you finish raw dog. When she rolls over you pretend to take the condom off and throw it away to assure her that you were wearing one.
So Bro: "She wouldn't let me bang her without a condom"
another description for "polishing the pewter", "shaking hands with ben franklin", "stroking the boa", "beating ones meat", "going on a date with jill", or just plain wacking it