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What do these construction mean? When can they be used?

She is a peach of a girl.

She is a bitch of a seller.

He is a genius of a man.

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Peach of a girl means a sweet girl. Example of usage in sentence - The nurse who treated me is a peach of a girl.

Bitch of a seller means unethical seller. Example of usage in sentence - She is that bitch of a seller who tried to sell me a house by concealing many facts.

Genius of a man is straightforward. Means, a man who is a genius. Example of usage - One who invented the Tesla car is a genius of a man.

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TicceShe is a peach of a girl.

This is OK. It is more or less a fixed expression meaning that she is of high quality. The other two are no good. The first noun has to be figurative. A genius of a man is simply a genius, and nobody would put it the other way. A mountain of a man is large. A bitch of a seller is pretty much meaningless, employing slang as it does in the most imprecise fashion. "Bitch" can be complimentary, meaning something like "dangerously formidable", but that sense does not seem to fit "seller" any better than the offensive sense of "vicious woman" does.

Any difference between:

He is a genius man.

He is a genius of a man.

Absolutely nobody would put it the other way? A few examples from the internet


1 A genius of a man has turned the humble deck chair into an epic flying machine.

2 An incredible talent, a genius of a man and, most importantly, a great person to know.

3 Although the character of Leonardo is anthropomorphic, you still feel you are witnessing a genius of a man who seems to have insatiable curiosity and drive.

4 But however great a genius of a man may be, his exploits cannot be all- pervasive.


Well, for someone "bitch" can be a compliment, but there must be a specific set of mind of the recipient who takes it as a compliment.

Students: We have free audio pronunciation exercises.
Ticce

Any difference between:

He is a genius man.

He is a genius of a man.

They are both unnatural ways of putting "He is a genius."

TicceHe is a genius man.

No, that is not good. Just "He is a genius."

TicceHe is a genius of a man.

That is very literary. It is not used in conversation. It is esoteric; very rarely used in books.

The more common expression is: He is a giant of a man. It means, of all men, he exemplifies the idea of being a giant, or someone greater than ordinary men in some, or all, respects. It is a statement of admiration.


Here are some literary quotes for "genius" (from Google Ngrams). There are very few citations.

A genius of a man, he was. He was a Chemistry teacher when I was a student here. He sparked my love for the sciences, and he really opened my eyes.”

I've heard that they study under an Egyptian tutor, a genius of a man, so they say. And they spend a lot of time with the captain of the palace guard for their military training.

Nothing like a great man, a genius of a man, is loose to-day; nor, as far as can be observed, is even in a cage. To take the case of this country: where is the genius, the daemonic one, loose in politics or public life?

As time went on, Daddy began selling more and more of his articles to a magazine called Success which was published by a genius of a man named Orison Swett Marden. Since that magazine was devoted to helping people change their lives.