ur·chin 
(ûrchĭn)
(ûrchĭn)n.
1. A playful or mischievous youngster; a scamp.
2. A sea urchin.
3. Archaic A hedgehog.
[Middle English urchone, hedgehog, from Old French erichon, from Vulgar Latin *ērīciō, ērīciōn-, from Latin ērīcius, from ēr.]