* A misspelling of a real Malayalam word: There could be a similar sounding word with a different spelling, but the meaning would depend on the actual word.
* A slang term or colloquialism: Some words are only understood within specific contexts or communities.
* A sound effect or imitation: It could be a sound like "vava" that is used to describe something, similar to "boom" or "whoosh."
To understand what "vava" means, you'll need more context. Please provide the sentence or situation where you encountered this word.