To help you find out what it means, could you please provide more context? For example:
* Where did you hear or see this word? (e.g., in a book, a movie, a conversation)
* Who was using it? (e.g., friends, family, colleagues)
* What was the situation? (e.g., a casual conversation, a formal setting)
With more information, I might be able to help you figure out what "goonah" means.