pigs might fly無稽之談，奇跡可能會發生
“The management might offer us a decent pay rise.” “Pigs might fly！”
buy a pig in a poke (未見實物而)亂買東西(吃了虧)
You'll have to show me the car; I don't intend to buy a pig in a poke
與豬有關的英語諺語
很早以前我就懂得，永遠不要與豬爭鬥。因為妳會弄得很臟，而豬就喜歡妳這樣。
I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it