From Longman Dictionary of Contemporary Englishroguishrogu‧ish /ˈrəʊɡɪʃ $ ˈroʊ-/ adjective BAD BEHAVIOUR OR ACTIONSsomeone with a roguish expression or smile looks amused, especially because they have done something slightly dishonest or wrong —roguishly adverb
Examples from the Corpus
roguish• Corbett had always liked Prince Edward; he had a roguish air, coupled with an almost childlike innocence.• Perhaps I was showing too many teeth which could make me appear roguish and untrustworthy.• She has the roguish attractiveness of a kitten and has known for weeks that the Captain looks at her.• In the golden days of cinema, feuds often erupted between roguish directors and powerful studio heads.• I treasure a bulging mental file of his roguish observations on fellow critics and luminaries in the music trade. 