1. superlative form of naughty; most badly behaved or disobedient
Usage: used especially of children
2. superlative form of naughty; most playfully mischievous or teasing
Usage: often used affectionately

Examples

• She was the naughtiest child in the class, always talking during lessons.
• The naughtiest puppy in the litter kept chewing everyone’s shoes.
• He gave her his naughtiest grin before hiding her keys.
• The teacher said Tommy was the naughtiest student she’d ever had.
• Even the naughtiest children behaved well during the school play.
• She had the naughtiest twinkle in her eye when she planned surprises.