* Aiwa: This is an Arabic word meaning "yes".
* Kwais: This is a Swahili word meaning "good".
* Miya Miya: This part is unclear. "Miya" in Arabic means "hundred". It's possible "Miya Miya" is a colloquial expression meaning "very good" or "perfectly".
Therefore, the entire phrase could be interpreted as "Yes, good, very good", but it's not a commonly used phrase in standard Arabic.
It's likely this phrase is a mix of Arabic and Swahili, perhaps used in a region where both languages are spoken.
If you can provide more context about where you heard this phrase, I might be able to provide a more accurate interpretation.