Definition
Used to express the idea that something is completely impossible or highly unlikely to happen.
根本不可能的事情；無稽之談
If he finishes the report on time, pigs might fly.
如果他準時完成報告，母豬都會上樹了。
She said she would give up coffee? Pigs might fly.
她說她會戒掉咖啡？母豬都會上樹了。
Do you think they will agree to our proposal? Pigs might fly.
你覺得他們會同意我們的提案嗎？母豬都會上樹了。