Meaning

• Mischievous; tending to misbehave or act badly (especially of a child).

  "Some naughty boys at school hid the teacher's lesson notes."

• Sexually provocative; now in weakened sense, risqué, cheeky.

  "I bought some naughty lingerie for my honeymoon."

• Evil, wicked, morally reprehensible.

• Bad, worthless, substandard.