Longman Dictionary of Contemporary English - naughty

~ adj 1 a naughty child behaves badly and is rude and disobedient  (You're a very naughty boy! Look what you've done!) 2 especially BrE used jokingly about an adult when you are pretending to disapprove of their behaviour  (it's naughty of sb to do sth spoken)  (It was a bit naughty of me to stay out so late last night.) 3 naughty jokes/magazines/pictures etc BrE naughty jokes etc deal with sex in a rude but not very serious way - naughtily adv - naughtiness n