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.
Test with a Reputable Company. There are a lot of Groupon coupons available for startup DNA testing companies, but for the most accurate results and the best chance of useful information and matches, genetic genealogists recommend testing at one of the big three: