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.
What is a 'Coupon'. The annual interest rate paid on a bond, expressed as a percentage of the face value. It is also referred to as the coupon rate, coupon percent rate and nominal yield.. Next Up. For example, a $1,000 bond with a coupon of 7% pays $70 a year.