deviltry n wicked and cruel behavior n reckless or malicious behavior that causes discomfort or annoyance in others Usage(s) If Bull Moore was above any kind of mix-up that concerned a girl, his dare-deviltry sometimes brought him to the edge of other kinds of trouble. Some East Germans fear that the "pocketbook blockade" of West Berlin (PTI, April 11) is only the prelude to "some new deviltry. Last week in Washington, Irving Brown was filling his little black bag with plans for a lot more anti-Communist deviltry. Synonym(s) devilry mischief mischief-making mischievousness devilment rascality roguery roguishness shenanigan