eats like a pig..吃得像猪一样，又多又难看
很早以前我就懂得，永远不要与猪争斗。因为你会弄得很脏，而猪就喜欢你这样。
I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it
pigs might fly无稽之谈，奇迹可能会发生
“The management might offer us a decent pay rise.” “Pigs might fly！”
buy a pig in a poke (未见实物而)乱买东西(吃了亏)
You'll have to show me the car; I don't intend to buy a pig in a poke
