It's possible that:
* It's a misspelling: Perhaps it's a typo for a different word.
* It's a slang term: It could be a regional slang term or a term used in a specific online community.
* It's a made-up word: Someone may have invented the word for a specific purpose, like a fictional character or a brand name.
To understand the meaning of "zayzee", you would need more context.
For example:
* Where did you encounter this word? Was it in a book, online, or in conversation?
* What was the context of the word's use? What was being discussed or described?
With more information, I might be able to help you figure out what "zayzee" means.