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.
The coupon payment is the amount that a company will pay to a bondholder normally on an annual or semi-annual basis. It is the coupon rate times the face value of the bond. For example, the coupon payment on an annual 10% bond with a 1000 dollar face value is 100 dollars.