The act of holding a woman's boobs by the nipples, pulling them together and inserting a dick or some other phallic object between the resulting cavern. If desired the dick can then be inserted in her mouth as well. *Note: this can only be done with big titties. Small titties result in lots of pain for the girl.
Dude! I totally got some rocket sex from that slut last night. She had some of the biggest tits i've ever seen... next to ur mom that is.