Snooki RIPPED By Tanning Mom You're Fat & Disgusting

5/4/2012 9:50 AM PDT

'Tanning Mom' RIPS Snooki -- You're Fat and Disgusting

More tan-on-tan aggression -- this time it's "Tanning Mom" firing back at Snooki ... claiming the reality star is "the biggest a**hole in the world" for criticizing her life decisions.

Patricia Krentcil -- who's been under fire for allegedly taking her 5-year-old daughter to a tanning salon -- was out in New Jersey yesterday ... when someone asked about the comments Snooki recently made to "Extra" -- "that b**ch is crazy."

Tanning Mom shot back ... saying, "She's the biggest a**hole in the world. She's fake, she's fat, her t*ts are fake, she's disgusting."

Yet, after all that ... she continued, "When this is all said and done, I'd like to meet up with 'Snoopy'."

Yes, she called her Snoopy ... and she probably owes Charles Schultz an apology.