What does bishi mean in bengali?

"Bishi" is not a word in Bengali. It's likely you're thinking of a similar-sounding word or there's a misunderstanding.

Could you please provide more context or information?

For example:

* What was the situation where you heard this word?

* Who said it?

* What were they talking about?

Knowing more about the situation will help me understand what you're asking and provide you with a more accurate answer.