money for old rope字面意思卖老绳子，引申为轻松赚来的钱。

【例句】
If you describe a payment as money for old rope, you are emphasizing that it is earned very easily, for very little effort.
如果你把一笔付款描述为买旧绳子的钱，你是在强调它是很容易赚来的，只需付出很少的努力。

Mr Buffett thinks this is money for old rope, a view it is hard to dispute in the case of the Madoff brokers.
巴菲特认为，这是个肥差，在马多夫经纪商的例子里，这一看法很难辩驳。