Sometimes Nicole "Snooki" Polizzi and Deena Cortese party a little too hard.

In Thursday's episode of Jersey Shore, the two Guidettes got so inebriated that they flashed their "cucas" while dancing at a nightclub in Riccione, Italy. "The nipple flap is one thing at the club," Jenni "JWoww" Farley said. "But you never forget your f--king underwear."

PHOTOS: Jersey Shore's wildest moments

A horrified Farley added: "All I know is Deena needs a wax."

As their embarrassed costars looked on, Polizzi and Cortese began a heavy makeout session that lasted for hours. "Nicole and Deena are digesting each other's tongues," Farley, 25, said. "I am so skeeved out, I want to throw up."

VIDEO: JWoww flaunts her sexy body

Added Sammi "Sweetheart" Giancola, 24: "They've been making out for three hours. I don't even make out this long with Ron."

The next morning, Polizzi, 23, and Cortese, 24, struggle to piece their night together. "Usually even if I'm blacked out, I know I did sex," Cortese shrugged.

VIDEO: Snooki on her body: "What the hell happened?"

Realizing she was out of control, Polizzi called up her boyfriend Jionni LaValle to come clean about her drunken hookup.

"All you did was make-out with Deena?" he asked calmly. "All right."

Tell Us: Were you shocked by Snooki and Deena's intense makeup?

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly