There is no known scientific concept or reaction called a "fermit reaction." It's possible that:

* You might have misspelled a term: Double-check the spelling to see if you meant a different type of reaction.

* It's a fictional term: The term might be from a specific fictional universe or story.

* It's a new or niche concept: It could be a very specialized term used in a specific scientific field or research area.

To get a more accurate answer, please provide:

* The context in which you encountered the term: Where did you hear or read about "fermit reaction"?

* More information about what you are looking for: What kind of reaction are you interested in? Are you looking for a specific type of chemical reaction, a nuclear reaction, or something else entirely?

With more details, I can help you find the right answer.