* A nonsensical word: It could be a made-up word, used for humorous effect or simply as a placeholder.
* A specific slang term: It might be a slang term used in a particular group or region, but without more context, it's impossible to say for sure.
* A misspelling: It could be a misspelling of another word. If you can provide more context, like where you heard it, or what the person was trying to say, we might be able to figure out what they meant.
To help me understand what "wiffwaff" might mean, please provide:
* The context in which you heard it: Was it in a conversation, a book, online, etc.?
* Any other words or phrases used around it: This might give clues to the meaning.
* The speaker's intentions: Were they trying to be funny, serious, or something else?
With more information, I can try to help you figure out what "wiffwaff" means.