a naughty child does not obey adults and behaves badly [≠ good]:
You're a very naughty boy! Look what you've done!
if an adult does something naughty, they do something that is not right or good, but is not very serious:
slightly badBritish English
I felt a bit naughty going off on my own, leaving the children behind.
naughty jokes, magazines, films etc deal with sex, especially in a humorous way [↪ rude, blue]
involving sexBritish English old-fashioned
—naughtiness noun [uncountable]