Source : WordNet®

gutsiest
     See {gutsy}

gutsy
     adj : marked by courage and determination in the face of
           difficulties or danger; robust and uninhibited; "you
           have to admire her; it was a gutsy thing to do"; "the
           gutsy...intensity of her musical involvement"-Judith
           Crist; "a gutsy red wine" [ant: {gutless}]
     [also: {gutsiest}, {gutsier}]