American Heritage Dictionary
(13)
Century Dictionary
(11)
GNU Webster's 1913
(3)
WordNet
(6)
Elsewhere on the web
Sections of the original read like shag-carpeted relics.— msnbc.com: Top msnbc.com headlines
• Aronson's Floor Covering Spring Warehouse Sale Up to a 60\% discount on hundreds of area rugs including shag, flatweave, and needlepoint rugs from Merida Meridian in wool, sisal, abaca, and jute, as well as on overstock and remnants from additional manufacturers.— Apartment Therapy Main
It will, apparently, work on your wood, granite or marble worktop, and on your thick-shag living-room carpet -- there's a video with the inventor.— Technology: Technology blog | guardian.co.uk

American Heritage Dictionary (5)
Century Dictionary (3)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word several times a year.