By now, you're probably familiar with Black Friday and Cyber Monday, but what about Green Monday? This buzz-word comes courtesy of eBay, and it describes one of their busiest shopping days of the year: the second Monday of December. The reason for this day's popularity? It kicks off the last week you can shop online and still have items delivered in time for Christmas. Basically, a dedicated shopping day for procrastinators. But there may be some wisdom in waiting to shop, as many retailers will be slashing their prices to encourage last-minute holiday spending. Brave enough to wait? Be sure to check back here on Monday, Dec. 14 for our round-up of Green Monday deals and coupon codes. And for those who like to shop ahead, take a look at our Black Friday page.