It comes from a David Mamet play, and there's two con artists in the play, and the woman is conning the man, and the man looks at the woman and says, "Oh, you're a bad pony, I'm not going to bet on you."
在大卫.梅米特的一部剧中， 有两个行骗高手， 其中女士在勾引男士， 于是他看着那位女士说： “你真调皮，我是不会犯错的。”