出典:Wiktionary
出典:『Wiktionary』 (2017/04/20 13:44 UTC 版)
From gray and collar by extension of white-collar and blue-collar, perhaps with gray being seen as intermediate between white and blue.
gray-collar (comparative more gray-collar, superlative most gray-collar)
出典:『Wiktionary』 (2011/01/12 21:06 UTC 版)