"Neither a borrower, nor a lender be" says that it is best to not lend [money] to other people and to not borrow from other people. When we lend something we risk losing both the thing we lend and the friendship with that other person. {from Hamlet by William Shakespeare; Polonius speaking: "Neither a borrower, nor a lender be; For loan oft loses both itself and friend"} Example question: "Could you lend me twenty dollars?" Answer: "Sorry, neither a borrower nor a lender be." This says that you value the friendship and you don't want to risk hurting the friendship with a loan.