The spelling of "fatfat" can be explained through the use of IPA phonetic transcription. The word is pronounced as /ˈfat.fat/, with emphasis on the second syllable. The repetition of the syllable "fat" is seen as a reduplication, a linguistic process where a word or part of a word is repeated for emphasis. In this case, the repetition of "fat" emphasizes the quality of the object or person being referred to as excessively or noticeably overweight. The spelling of "fatfat" accurately represents the phonetic pronunciation of the word.
I apologize, but "fatfat" does not have a standard dictionary definition as it does not appear to be a recognized word in the English language. It is possible that "fatfat" may be a made-up or slang term, an onomatopoeic expression, or a personal or local reference. To ensure an accurate definition, it would be helpful to have more context or information about the word's origins, usage, or intended meaning.
If "fatfat" is intended as a repetitive word, it may be used to emphasize the quality or magnitude of something. For example, in phrases like "fatfat paycheck" or "fatfat meal," this repetition could symbolize abundance or excess. However, please note that this interpretation is speculative, given the lack of background information.
To obtain a precise definition for "fatfat," it would be advisable to consult a formal dictionary or provide more context for the term's intended use.