What does Flapish mean?

"Flapish" is not a recognized word in the English language. It's possible that it's a misspelling or a made-up word.

If you encountered this word, could you please provide more context?

For example:

* Where did you see it? (e.g., a book, a website, a conversation)

* What was the surrounding text?

With more information, I might be able to help you understand what the intended meaning was.