Possible meanings:
* "Prestan" could be a misspelling of "prestar," which means "to lend" or "to loan."
* It might be a regional dialect word or slang. To understand the meaning, we would need more context about where you heard it.
Could you provide more context?
* Where did you hear this word?
* What was the sentence or situation it was used in?
With more information, I can help you understand the meaning of "prestan."