2009 Jeggings, the portmanteau that took the denim world by storm, first appeared, trademarked by Sanko Tekstil, a Turkish company. Shortly afterward, accepting a challenge from Tim Gunn, Conan O'Brien sported them on his show. "I'm never taking them off. You can pry them from my cold, Irish legs," he tweeted later. In 2011, the term entered the Concise Oxford English Dictionary, along with "retweet" and "sexting." Photo: Max Mumby/Indigo/Getty Images
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