Pacific Pile-Driver
N. (From the Chinese 鱼磅, or Yú bàng meaning "Fish Pounder") The stinky, sexual act of taking a large skip-jack tuna, or any other, smelly, deep-sea pacific fish, and pounding your partner's genitals with the slimy, scalely, fish, in the middle of intercourse.
Harry: Can i get a fresh tuna? Fishmonger: Yes, but i must ask, why do buy so much pacific tuna? Harry: My Asian girlfriend enjoys a good Pacific Pile-Driver."