english: 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."
non_english: ki izvira iz dramske igre Davida Mameta. V igri nastopata dva prevaranta. Ženska poskuša nalagati moškega. Moški jo pogleda in reče, slab konj si. Nate ne bom stavil.