A shag is a heavy

worsted Worsted ( or ) is a high-quality type of wool yarn, the fabric made from this yarn, and a yarn weight category. The name derives from Worstead (from Old English ''Wurðestede'', "enclosure place"), a village in the English county of Norfolk. T ...

textile with a long pile. In the 17th century, the term was also used to refer to inferior silk material. Shag became popular as a material for carpets in the 1960s and 1970s.

References

1970s fads and trends Pile fabrics Rugs and carpets {{textile-stub