The correct spelling of the phrase "more fargone" is actually "more far gone". The pronunciation of this phrase in IPA phonetic transcription is /mɔːr fɑːr ɡɒn/, where the stressed syllables are indicated with a marker. This phrase implies a situation or a person who has progressed further in a negative direction, often to the point where recovery or improvement is unlikely or impossible. It's important to use the correct spelling to convey the intended meaning in communication.
"More fargone" does not have a specific etymology as it is not a recognized English phrase or word. It appears to be a novel construction or a combination of words that does not have a conventional linguistic origin or meaning.