What does da mean in dutch?

"Da" is not a word in Dutch. It's likely you're thinking of a different language or a slang term.

Could you provide more context? For example:

* Where did you hear "da" used? (In a song, movie, conversation, etc.)

* What was the sentence it was used in?

* What language do you think it might be from?

This information will help me understand what you're asking and give you a more accurate answer.