slough (plural sloughs) 1  The skin shed by a snake or other reptile. That is the slough of a rattler; we must be careful. 2  Dead skin on a sore or ulcer. This is the slough that came off of his skin after the burn.
The name Groupon is a combination of the words group and coupon, which references the company's viral marketing business model.
By obtaining or purchasing a Coupon through the Site, you acquire the right to redeem the Coupon with the Merchant. Any service fee retained by Groupon from the sale of a Coupon, if applicable, is compensation to Groupon for marketing, promoting, advertising and distributing the Coupons on behalf of the Merchant.