Gamin (noun)

1. A street urchin or a mischievous child, especially one who lives on the streets.
2. A young boy or girl who is playful, cheeky, and often gets into trouble.

Origin:

From french gamin, diminutive of gamine, a girl, a young person, probably from old french gamine, diminutive of gambe, leg, from latin gamba, ankle.

Examples:

1. The gamin was always getting into trouble, but he had a heart of gold.
2. The gamin's mischievous grin made it hard to stay mad at him.
3. The gamin was known for his street smarts and quick thinking.
4. The gamin's eyes sparkled with mischief as he whispered his plan to his friends.
5. The gamin was always on the lookout for something to do, never content to stay in one place for long.