To help me understand what you're looking for, could you please provide more information? For example:
* Where did you hear this term? (e.g., in a conversation, a website, a product description)
* What was the context? (e.g., was it related to clothing, religion, or something else?)
* What do you think it might mean? (even if you're unsure)
With more information, I can help you figure out what "modesty pouch" might refer to.