You should have said, "Gama Su!" and hoped he knew Japanese.
An American businessman goes to Japan to meet with clients. The night before the meeting, he hires a Japanese "escort," and they end up in bed. He's giving it to her strong, and she keeps moaning, "Gama Su! Gama Su!" He's so turned on that she's so into it, that he keeps slamming her harder and she keeps up with "Gama Su!"
The next day, he goes out to play golf with his Japanese clients. On the very first hole, one of them tees up, hits a perfect shot and the ball rolls into the cup -- a hole-in-one! The American uses his newly-learned language skill yelling "Gama Su! Gama Su!"
To which the Japanese guy said, "What do you mean 'wrong hole?'"