【正确答案】It means something that is not buttoned or not under constraint in action or expression.

【答案解析】原句为“Every publication in America today includes pages that would appear, to the purist of forty years ago, unbuttoned gibberish.”意为“今天美国所出版的每一种书刊都有一些版面在四十年前喜欢咬文嚼字的人看来满纸尽是信口胡言。 ”