* A misspelling: Check if you've made a typo. Maybe you meant a different word that sounds similar?
* A regional term: Could be a slang or dialect word used in a specific area.
* A fictional word: It might be used in a book, movie, or game.
Please provide more context:
* Where did you encounter this word?
* What was the surrounding text or situation?
With more information, I can better assist you in understanding the meaning of "Shagonigei".