The difference between "shag" and "layered"
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A: The term "shag" as it concerns hairstyles refers to a short to mid-length layered haircut.
Like many names for hairstyles, "shag" was coined to appeal to a newer generation, simple marketing. In the 60s and 70s, stars like Rod Stewart, David Bowie, Leif Garrett, and Andy Gibb sported shag hairstyles. In the 80s, many of the 'big hair' heavy metal rock bands revived shag haircuts in one variation or another.
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See also:
How to cut a shag
What is the definition of a shag haircut?
What products and items should I use to style a shag haircut?
Is it possible to put your hair in a ponytail when you have a long shag hairstyle?