I am hungry.I can eat a horse.什么不是pig or elephant?

问题描述:

I am hungry.I can eat a horse.什么不是pig or elephant?
It's a saying.I am hungry.I can eat a horse.为什么不是I can eat a pig.或是I can eat an elephant?
想知道有什么典故没?
知道这是习语,俗语,惯用语...就得这么说.
想知道的是---这句话的来源、出处或是典故什么的!
老美用“I can eat a hog.”一定也是觉得“I can eat a horse.”有点让人费解吧?

有一个短语 eat like a horse (吃得多),也许可以作参考.