The word "metaphor" means carrying something from one place to another . . . and it is when you describe something by using a word for something that it isn't. This means that the word "metaphor" is a metaphor.
I think it should be called a lie because a pig is not like a day and people do not have skeletons in their cupboards. And when I try and make a picture of the phrase in my head it just confuses me because imagining and apple in someone's eye doesn't have anything to do with liking someone a lot and it makes you forget what the person was talking about.
