Angelina Pivarnick, formerly of Jersey Shore, is fairly used to being smacked around by JWoww and Snooki. Now she's been slapped in a different way.

With a lawsuit.

Ange's alleged "violent assault" on a female clubgoer before a Celebrity Boxing match in New Jersey last month is the reason for the legal fisticuffs.

Melissa Mayne claims she was leaving a nightclub at the Trump Taj Mahal Hotel and Casino when she bumped into Angelina ... who was on her way to box.

Mayne claims Angelina punched her grill, shoved her and threw a glass in her face. She also snatched her phone and threw it across the room. Ouch!

She is also going after the hotel, claiming this went down in front of Trump security guards, who did not intervene or "even attempt to stop" Pivarnick.

Angelina was likely just trying to remain relevant, given that the Jersey Shore season premiere was the biggest episode yet - sans her annoying a$$.

She's suing Pivarnick, who's seeking a new reality show, for unspecified damages.