Sex in which a man places his penis between a woman's breasts and jerks himself off with them.
"I did a Russian on that girl over there with the huge boobs."
Of, pertaining to or being illegal, amoral or generally below-board. Not as a slur against the country or people of Russia, but more to do with the great online cut-price MP3 e-stores emanating from Russia (see AllOfMP3.com, MP3Sparks.com etc.).
P: Mate, check it out, I got some proper russian DVDs down the car-boot sale.
T: Screeners or DVDRips?
J: If you've ordered the game, why don't you just download it and play a russian copy till it arrives?
A: I can't! I feel dirty…