Could you please provide more information? For example:
* Where did you hear this phrase? Was it in a conversation, a book, a movie, etc.?
* What was the context of the phrase? What were people talking about?
* What does the phrase *likely* mean to you? Even if you're unsure, giving your best guess can help clarify your question.
With more context, I might be able to help you understand the meaning of "stringing weed."