Ever wonder how Jersey Shore's Nicole "Snooki" Polizzi got her infamous nickname?

"I was at a middle school dance and I was the first one to kiss a boy out of my friends," the 21-year-old tanning fanatic told Jay Leno Tuesday night. "You know Save The Last Dance, the movie? Snooki was the DJ. So the Snooki character was very funny, very outgoing, and my friends just started calling me Snooki. It's stuck ever since!"

The pint-sized reality star also admitted that despite her show's raunchy antics, her parents are proud of what she's accomplished -- even though her mom wishes she'd tone it down.

"My Dad is my biggest fan," Polizzi said. "My mom is like, 'What the hell are you doing? I didn't raise you like that! Why are you drinking? Why are you kissing all these boys? Why are you partying?' But, you know, they're proud of me."

The second season of Jersey Shore premieres July 29 on MTV.

Watch the video now (above)!