I'll eat my hat 绝不可能
Watermelons are thought to have originated in southern Africa, where they can be found growing wild. Cricket fans wore hats carved out of watermelons during the second Test match between South Africa and Australia this week.
I'll eat my hat 我会吃了我的帽子，这个表达的实际意思是说一件事情绝对不可能发生。
If Arsenal win the Champions League, I'll eat my hat!
I don't think I'll make it past the interview stage for this job. If I do, I'll eat my hat!
If the government survives this latest scandal, I'll eat my hat!
Eat your words 这个短语的字面意思是你不得以得把自己说的话吃了，其实际意思是你承认自己对某件事情的判断产生错误。
I advised Suzanne against setting up her own business, because I didn't think it would be successful. Well, I've had to eat my words - she's now a multi-millionaire!