Ron-Ron juice: Don't leave home without it!

Nicole "Snooki" Polizzi says she and her Jersey Shore housemates can't hit local hotspots like Karma and Beachcomber without generous swigs of their favorite cocktail.

"We start drinking Ron-Ron juice at like 8 o'clock," Snooki, 22, explained of their pre-club ritual during her Tuesday appearance on the Late Show with David Letterman. "It messes you up!"

She gave David Letterman a loose recipe for the drink: "It's vodka, watermelon, cherries, blueberries and maybe some [Jagermeister]."

The host clarified: "So you're pretty much hammered before you leave the place, right?"

"Oh, you have to," the pint-sized reality star insisted. "You can't go to a club sober."

Snooki also described her M.O. once she arrives at the club. "I like to get it up on the dance floor," she said, making an unintended dirty joke. "I mean like beat up the beats! I mean like dancing!"