Source : WordNet®

unbuttoned
     adj 1: not buttoned; "the wind picked up the hem of her unbuttoned
            coat" [syn: {unfastened}] [ant: {buttoned}]
     2: not under constraint in action or expression; "this
        unbuttoned and disrespectful age"- Curtis Bok; "unlaced
        behavior in the neighborhood pub" [syn: {unlaced}]