Swap Gravy. Verb. The act of two women rubbing their genitalia together, thereby exchanging bodily fluids.

Apparently, Scarlett Johansson and Penelope Cruz swap gravy in a steamy lesbian scene in the next Woody Allen film, Vicky Christina Barcelona. A source tells Page Six:

It is also extremely erotic. People will be blown away and even shocked. Penelope and Scarlett go at it in a red-tinted photography dark room, and it will leave the audience gasping.

Gasping? Really? Given the median age of a Woody Allen filmgoer these days (77), I suspect that's just their oxygen tanks acting up. Don't get me wrong; Scarlet and Penelope are attractive people, but I suspect a Woody Allen lovemaking scene would involve entirely too much dialogue -- the usual Woody Allen patter. There'd be so much ketching about bra straps and over analyzing the semantics, that by the time they got down to doing the nasty, the audience will have already fallen asleep.