VIDEO: Snooki's Fist-Pumping Appearance on David Letterman

Nicole "Snooki" Polizzi chatted with David Letterman Tuesday night and filled him in on all the secrets of the Jersey Shore — from smooshing to the fist pump.

Dave was interested to know about the amount of sexual activity on the show and Snooki made sure to pin it on all her male costars.

"Their mission when they go out to the club is to get it in and smoosh," the pint-sized guidette said.

Then she taught Dave the art of fist-pumping.