pig out (on something)
狼吞虎咽地大吃
I love to pig out on ice cream.
我瘋狂愛吃冰激凌。
The food was free, so I pigged out.
那里吃的不要錢，所以我吃了好多。

when pigs fly
絕對不可能
Sure he'll pay for the drinks-when pigs fly.
他才不會給我們買喝的！

put lipstick on a pig
粉飾某物來誘導或欺騙別人。
It looks like they've just put lipstick on a pig for the iPhone SE. It's just the same phone as 2 years ago, but in bright new colors.
蘋果公司只是粉飾了一下iPhone SE，這手機和之前那款明明就差不多，只不過顏色不一樣啊。

cast-iron stomach
鐵胃
Jack has such a cast-iron stomach that he can eat a ghost pepper and feel perfectly fine afterward.
強子的胃真的好，他吃超辣的辣椒都完全沒反應！（假的，強子不是很能吃辣嘻嘻）
You must have a cast-iron stomach if you're having apples and coffee for breakfast!
如果你早餐一邊吃蘋果一邊喝咖啡還覺得OK的話，你一定有一個鐵打的胃！

everything but the kitchen sink
一個人能想到的所有東西
John orders everything but the kitchen sink when he goes out to dinner, especially if someone else is paying for it.
John每次去餐廳吃飯都會把菜單上的點完，尤其是有人買單的時候。
Morning English podcasts could include topics about everything…. possibly even the kitchen sink!
我們早安的節目有你們能想象到的各種各樣的主題哦！hin有趣的咧！

put a sock in it
往某人的嘴里塞襪子，就是表示要別人閉嘴。（是一個比較不禮貌的用法哦，不要對長輩對同事說）
Put a sock in it, all of you. I'm trying to watch TV.
誒誒誒你們都給我閉嘴！我要看我愛豆了！
Oh, put a sock in it! No one wants to hear your complaints anymore.
我的天哪你可閉嘴吧！沒人想聽你抱怨了OK？