"Skunk" is actually a strain name, the chances you're actually holding "skunk" the strain is very slim.
In the UK the word "Skunk" is used wrongly like the word "Dro" in the USA to describe some very nice bud. Whether it is actually Skunk the strain or grown hyDROponicly is usually besides the point the phrases are just attached to "dank" looking weed as it passes down the line to help shift the product.
The word "Skunk" is also wrongly used buy the UK media alot so most of the confusion of terms comes from there.