Question

Is this personification: an exaggeration that cannot be true?

Answer 1

No, Personification is giving non-living things or objects a human characteristic. like "The Dress danced along with me" or "The painting was staring at me." An exaggeration that cannot be true is Eithier and Idiom, or a hyperbole. I think you are thinking of an Idiom.

Answer 2

I don't think that it is